Exhaust Temperature Module Caterpillar


Communication - SAE J1939 CAN Data Link and RS-485 Data Link

Usage:

G3516 4EK
The Exhaust Temperature Module (ETM) supports the following datalinks:

  • SAE J1939 CAN data link

  • RS-485 data link

These datalinks allow the transmission of temperatures from the ETM to other components such as an EMCP 3.3, an Advisor Panel, or other supported J1939 devices.

Portions of this material are reprinted with permission from SAE J1939DA_201607© 2016 SAE International. SAE International is not responsible for any use or translation of this material, in whole or in part. Please contact SAE International to obtain a complete copy of SAE J1939DA_201607, the official definitive source of this standard.

Table 1 lists the Parameter Group Number (PGN) and the Suspect Parameter Number (SPN) that are available for configuration for the temperature inputs.

Table 1
PGN  SPN  Description 
65 187 (00FEA3)  1137  Exhaust Gas Port 1 Temperature 
65 187 (00FEA3)  1138  Exhaust Gas Port 2 Temperature 
65 187 (00FEA3)  1139  Exhaust Gas Port 3 Temperature 
65 187 (00FEA3)  1140  Exhaust Gas Port 4 Temperature 
65 186 (00FEA2)  1141  Exhaust Gas Port 5 Temperature 
65 186 (00FEA2)  1142  Exhaust Gas Port 6 Temperature 
65 186 (00FEA2)  1143  Exhaust Gas Port 7 Temperature 
65 186 (00FEA2)  1144  Exhaust Gas Port 8 Temperature 
65 185 (00FEA1)  1145  Exhaust Gas Port 9 Temperature 
65 185 (00FEA1)  1146  Exhaust Gas Port 10 Temperature 
65 185 (00FEA1)  1147  Exhaust Gas Port 11 Temperature 
65 185 (00FEA1)  1148  Exhaust Gas Port 12 Temperature 
65 184 (00FEA0)  1149  Exhaust Gas Port 13 Temperature 
65 184 (00FEA0)  1150  Exhaust Gas Port 14 Temperature 
65 184 (00FEA0)  1151  Exhaust Gas Port 15 Temperature 
65 184 (00FEA0)  1152  Exhaust Gas Port 16 Temperature 
65 183 (00FE9F)  1153  Exhaust Gas Port 17 Temperature 
65 183 (00FE9F)  1154  Exhaust Gas Port 18 Temperature 
65 183 (00FE9F)  1155  Exhaust Gas Port 19 Temperature 
65 183 (00FE9F)  1156  Exhaust Gas Port 20 Temperature 
65 270 (00FEF6)  173  Exhaust Gas Temperature(1) 
64 851 (00FD53)  4151  Average Cylinder Temperature(2) 
65 031 (00FE07)  2434  Left Manifold Exhaust Gas Temperature 
65 031 (00FE07)  2433  Right Manifold Exhaust Gas Temperature 
65 178 (00FE9A)  1172  Turbocharger 1 Compressor Inlet Temperature 
65 178 (00FE9A)  1173  Turbocharger 2 Compressor Inlet Temperature 
65 178 (00FE9A)  1174  Turbocharger 3 Compressor Inlet Temperature 
65 178 (00FE9A)  1175  Turbocharger 4 Compressor Inlet Temperature 
65 176 (00FEA98)  1180  Turbocharger 1 Turbine Inlet Temperature 
65 175 (00FEA97)  1184  Turbocharger 1 Turbine Outlet Temperature 
65 176 (00FEA98)  1181  Turbocharger 2 Turbine Inlet Temperature 
65 175 (00FEA97)  1185  Turbocharger 2 Turbine Outlet Temperature 
65 176 (00FEA98)  1182  Turbocharger 3 Turbine Inlet Temperature 
65 175 (00FEA97)  1186  Turbocharger 3 Turbine Outlet Temperature 
65 176 (00FEA98)  1183  Turbocharger 4 Turbine Inlet Temperature 
65 175 (00FEA97)  1187  Turbocharger 4 Turbine Outlet Temperature 
(1) Exhaust Gas Temperature is "Average Cylinder Exhaust Temperature." ETM's with a serial number lower than 2953 use PGN 65 270.
(2) ETM's with a serial number 2953 and greater use PGN 64 851.

Configuring the ETM with the Electronic Modular Control Panel (EMCP)

Reference: For more detailed information, refer to Systems Operation, Troubleshooting, Testing and Adjusting, RENR7902, "EMCP 3 Control Panel".

Reference: For more detailed information, refer to Application and Installation Guide, LEBE5255, "EMCP 3.1, 3.2, 3.3 Generator Set Control A & I Guide"

The ETM broadcasts standard SAE J1939 Parameter Group Numbers (PGN) and Suspect Parameter Numbers (SPN) on the J1939 CAN Data link.

Note: Only EMCP 3.3 and higher are compatible with the standard SAE J1939 CAN data link that is used by the ETM. EMCP 3.1 or EMCP 3.2 will not communicate with the J1939 CAN data link that is used by the ETM.

Set up the EMCP 3.3 module in order to display the engine exhaust temperatures which are broadcast by the ETM.

Set up the EMCP 3.3 Panel

Perform the following procedures in order for the EMCP 3.3 to display the cylinder temperatures.

  1. Scroll through the following screens on the EMCP 3.3:

    • Main menu

    • Configure

    • Setpoints

    • Engine monitor/protect

    • Enhanced engine monitor

  2. Set the "Engine Cylinder Temperature Sensor Install Status" to "Installed".

  3. Set the number of engine cylinders to correspond with the number of cylinders on the engine.

  4. Verify functionality by pressing the ENGINE OVERVIEW button followed by the DOWN arrow button. The cylinder temperatures should be displayed toward the bottom of the list.

Note: Asterisks **** displayed on the EMCP 3.3 screen indicates that either the configuration settings are incorrect or that the EMCP 3.3 is not programmed to display the information it is receiving from an external module such as the ETM.

First recheck the setup steps in order to ensure that all steps were correctly completed and that the configuration settings are correct. If asterisks are still present but everything else is functioning normally, the EMCP 3.3 may not be programmed for the additional ETM data which is being broadcast. In this case, the information broadcast from the ETM will be available on the LCD on the front of the ETM.

Configuring the ETM with the Advisor Panel

The ETM broadcasts standard SAE J1939 PGN and SPN on the J1939 CAN Data link. If a Caterpillar Advisor Module is connected to the J1939 CAN network, for instance, an Advisor Panel on a G3500 engine, the Advisor Panel will automatically display exhaust cylinder temperatures without changing any parameters on the Advisor Panel.

Note: Asterisks **** displayed on the advisor screen indicates that either the configuration settings are incorrect or that the advisor is not programmed to display the information it is receiving from an external module such as the ETM.

First recheck the setup steps in order to ensure that all steps were correctly completed and that the configuration settings are correct. If asterisks are still present but everything else is functioning normally, the advisor may not have the correct version of software or may not be programmed for the additional ETM data which is being broadcast. In this case, the information broadcast from the ETM will be available on the LCD display on the front of the ETM.

RS-485 Datalink and Communication

The ETM is part of a system that has been designed in order to interface with popular computers, terminals, and programmable controllers. The serial communications are compliant to the Modicon Modbus RTU standard. This standard uses RS-485 for the hardware communication format.

A serial RS-485 data link allows communication between a "Master" and a "Slave" unit.

Master-Slave Circuit Operation

The ETM's RS-485 communication system is designed as a master-slave circuit. Each unit responds to a unique node number only after the unit is interrogated by the master computer. The units communicate with the master via a polling system. The master sends a command and only the polled slave responds. The slave modules can never initiate a communications sequence. A simple command and response communication protocol must be strictly observed. The slave is the 195-0383 Pyrometer Gp. This remote terminal unit does not have the capability to communicate over the J1939 CAN data link. The 195-0383 Pyrometer Gp is designed to communicate over the RS-485 data link.

Node Number

The node number is used in the system in order to identify the desired slave unit being polled. The node number can be any numeric value from 1 to 99. The range of numbers (1 to 99) is allowed in order to group devices by a function or by an application. The first digit can be used as the group or engine number and the second digit as the unit number. For example, 53 could be used to identify the number 3 slave unit mounted on engine number 5.

Half-Duplex Operation

The RS-485 system uses two wires for communication. The system can only send data or the system can receive data at one time over the same two wires. When the master is in the transmit mode, the slave is in the receive mode. When the slave is in the transmit mode, the master is in the receive mode.

Electrical Operating Range

RS-485 is a communications standard that is used in order to satisfy the need for multi-dropped systems that can operate at high speeds over long distances. RS-485 uses a balanced differential pair of wires that switch from 0 to 5 volts in order to communicate data. RS-485 drivers can handle common mode voltages from −7 to +12 volts without loss of data.

Communications Parameters

The following parameters must be set by the master in order to communicate with the slave:

  • Baud rate: 9600

  • Data bits: 8

  • Stop bits: 1

  • Parity: None

Communications Wiring

Every slave unit has a direct connection to the master. This allows any slave unit to be removed from service without affecting the operation of the other units. Every unit must be programmed with a unique address or node number, but the addition of new units or nodes can be in any order. To minimize unwanted reflections on the transmission line, arrange the bus as a trunk line going from one module to the next. Avoid random structures of the transmission line. Special care must be taken with long busses (500 feet or more) in order to ensure error free operation. Long busses must be terminated with a 120 ohm resistor between the terminals marked RS-485 A (pin 70) and RS-485 B (pin 69) at the master only. Use twisted pair shielded cable in order to enhance signal fidelity. In order to prevent ground loops, the shield must be connected to the shield terminal at the master only.

Connecting to a PC

When connecting the ETM to the RS-232 port on a PC, an RS-232 to RS-485 converter must be used for the communication interface.



Illustration 1g01473834

Loading

RS-485 uses a balanced differential pair of wires that switch from 0 to 5 volts in order to communicate data. In situations where many units (32 max) are connected together on a long run, voltage drop on the communications leads becomes a major problem. Voltage drops on the RS-485 minus lead appear as a common mode voltage to the receivers. While the receivers are rated to a maximum voltage difference of ±7 volts (−7V to +12V), a practical system should not have a voltage difference exceeding ±3 volts under normal conditions. The wire gauge used for the connections therefore limits the maximum number of units or the maximum length of wire between units in each application. The following formula can be used as a guideline to select the appropriate wire gauge.

  • For 18 AWG wire, the number of units equals 4000 per feet of wire used

  • For 20 AWG wire, the number of units equals 2500 per feet of wire used

  • For 22 AWG wire, the number of units equals 1600 per feet of wire used

Note: The maximum number of units connected together in a system is 32.

Modbus Registers

Modbus communications are as follows:

  • The maximum number of registers that can be read at one time is limited to 32.

  • The maximum number of booleans that can be read at one time is limited to 256.

  • All communications are at 9600 baud, 8 Data bits, No Parity, 1 Stop bit (9600 8N1).

Note: All temperatures are stated in 0.1 Degree Kelvin (for universal compatibility). A register value of 2730 is 273.0 degree K, which is 0 degree C, or 32 degree F.

The descriptions of the MODBUS registers are listed in Tables 2 through 5. The following abbreviations are used in the tables:

  • C = Degrees C

  • F = Degrees F

  • NO = Normally open

  • NC = Normally closed

  • CYL = Cylinder

  • H = High

  • LO = Low

  • TMP = Temperature

  • DEV = Deviation from average

  • TO = Turbocharger outlet

  • TI = Turbocharger inlet

  • ACK = Acknowledge

  • TC = Thermocouple

  • OOR = Out of range

  • DIF = Differential

  • L = Latched

  • NL = Not latched

  • ARM = Arming

  • ALM = Alarm

  • InStat = Input status

Table 2
00000 Modbus Registers 
Register  Description 
00001  UNITS 0=C, 1=F 
00002  AUTOSCAN 1=ON 
00003  SETUPLOCK 1=ON 
00004 to 00012  Reserved 
00013  OUT1 0=NO, 1=NC 
00014  OUT1 0=NL, 1=L 
00015  OUT2 0=NO, 1=NC 
00016  OUT2 0=NL, 1=L 
00017  CYL DEV ACTIVE 
00018  CYL H1 ACTIVE 
00019  CYL H2 ACTIVE 
00020  TO H1 ACTIVE 
00021  TO H1 ACTIVE 
00022  TI HI ACTIVE 
00023 to 00032  Reserved 
00033  ARM TMP CYL DEV 
00034  ARM TMP CYL H1 
00035  ARM TMP CYL H2 
00036  ARM TMP TO H1 
00037  ARM TMP TO H2 
00038  ARM TMP TI HI 
00039  Reserved 
00040  Reserved 
00041  ARM TMP CYL DEV 
00042  ARM TMP CYL H1 
00043  ARM TMP CYL H2 
00044  ARM TMP TO H1 
00045  ARM TMP TO H2 
00046  ARM TMP TI HI 
00047  Reserved 
00048  Reserved 
00049  OUT no 1 CYL DEV 
00050  OUT no 1 CYL H1 
00051  OUT no 1 CYL H2 
00052  OUT no 1 TO H1 
00053  OUT no 1 TO H2 
00054  OUT no 1 TI HI 
00055  Reserved 
00056  Reserved 
00057  OUT no 2 CYL DEV 
00058  OUT no 2 CYL H1 
00059  OUT no 2 CYL H2 
00060  OUT no 2 TO H1 
00061  OUT no 2 TO H2 
00062  OUT no 2 TI HI 
00063  Reserved 
00064  Reserved 
00065  CH no 01 DEV ACK 
00066  CH no 01 HI1 ACK 
00067  CH no 01 HI2 ACK 
00068  CH no 01 HI ACK 
00069  CH no 02 DEV ACK 
00070  CH no 02 HI1 ACK 
00071  CH no 02 HI2 ACK 
00072  CH no 02 HI ACK 
00073  CH no 03 DEV ACK 
00074  CH no 03 HI1 ACK 
00075  CH no 03 HI2 ACK 
00076  CH no 03 HI ACK 
00077  CH no 04 DEV ACK 
00078  CH no 04 HI1 ACK 
00079  CH no 04 HI2 ACK 
00080  CH no 04 HI ACK 
00081  CH no 05 DEV ACK 
00082  CH no 05 HI1 ACK 
00083  CH no 05 HI2 ACK 
00084  CH no 05 HI ACK 
00085  CH no 06 DEV ACK 
00086  CH no 06 HI1 ACK 
00087  CH no 06 HI2 ACK 
00088  CH no 06 HI ACK 
00089  CH no 07 DEV ACK 
00090  CH no 07 HI1 ACK 
00091  CH no 07 HI2 ACK 
00092  CH no 07 HI ACK 
00093  CH no 08 DEV ACK 
00094  CH no 08 HI1 ACK 
00095  CH no 08 HI2 ACK 
00096  CH no 08 HI ACK 
00097  CH no 09 DEV ACK 
00098  CH no 09 HI1 ACK 
00099  CH no 09 HI2 ACK 
00100  CH no 09 HI ACK 
00101  CH no 10 DEV ACK 
00102  CH no 10 HI1 ACK 
00103  CH no 10 HI2 ACK 
00104  CH no 10 HI ACK 
00105  CH no 11 DEV ACK 
00106  CH no 11 HI1 ACK 
00107  CH no 11 HI2 ACK 
00108  CH no 11 HI ACK 
00109  CH no 12 DEV ACK 
00110  CH no 12 HI1 ACK 
00111  CH no 12 HI2 ACK 
00112  CH no 12 HI ACK 
00113  CH no 13 DEV ACK 
00114  CH no 13 HI1 ACK 
00115  CH no 13 HI2 ACK 
00116  CH no 13 HI ACK 
00117  CH no 14 DEV ACK 
00118  CH no 14 HI1 ACK 
00119  CH no 14 HI2 ACK 
00120  CH no 14 HI ACK 
00121  CH no 15 DEV ACK 
00122  CH no 15 HI1 ACK 
00123  CH no 15 HI2 ACK 
00124  CH no 15 HI ACK 
00125  CH no 16 DEV ACK 
00126  CH no 16 HI1 ACK 
00127  CH no 16 HI2 ACK 
00128  CH no 16 HI ACK 
00129  CH no 17 DEV ACK 
00130  CH no 17 HI1 ACK 
00131  CH no 17 HI2 ACK 
00132  CH no 17 HI ACK 
00133  CH no 18 DEV ACK 
00134  CH no 18 HI1 ACK 
00135  CH no 18 HI2 ACK 
00136  CH no 18 HI ACK 
00137  CH no 19 DEV ACK 
00138  CH no 19 HI1 ACK 
00139  CH no 19 HI2 ACK 
00140  CH no 19 HI ACK 
00141  CH no 20 DEV ACK 
00142  CH no 20 HI1 ACK 
00143  CH no 20 HI2 ACK 
00144  CH no 20 HI ACK 
00145  CH no 21 DEV ACK 
00146  CH no 21 HI1 ACK 
00147  CH no 21 HI2ACK 
00148  CH no 21 HI ACK 
00149  CH no 22 DEV ACK 
00150  CH no 22 HI1 ACK 
00151  CH no 22 HI2 ACK 
00152  CH no 22 HI ACK 
00153  CH no 23 DEV ACK 
00154  CH no 23 HI1 ACK 
00155  CH no 23 HI2 ACK 
00156  CH no 23 HI ACK 
00157  CH no 24 DEV ACK 
00158  CH no 24 HI1 ACK 
00159  CH no 24 HI2 ACK 
00160  CH no 24 HI ACK 
00161 to 00162  Reserved 

Table 3
10000 Modbus Registers 
Register  Description 
10001  RESET 
10002  ENGINE SENSE 
10003  OUT no 1 FAULT 
10004  OUT no 2 FAULT 
10005  AVERAGE MET 
10006  TIMER EXPIRED 
10007 to 10016  Reserved 
10017  CYL DEV ARMED 
10018  CYL HI1 ARMED 
10019  CYL HI2 ARMED 
10020  TO HI1 ARMED 
10021  TO HI2 ARMED 
10022  TI HI ARMED 
10023 to 10032  Reserved 
10033  TC no 01 TC LOW 
10034  TC no 01 LO OOR 
10035  TC no 01 HI OOR 
10036  TC no 01 TC OPEN 
10037  TC no 02 TC LOW 
10038  TC no 02 LO OOR 
10039  TC no 02 HI OOR 
10040  TC no 02 TC OPEN 
10041  TC no 03 TC LOW 
10042  TC no 03 LO OOR 
10043  TC no 03 HI OOR 
10044  TC no 03 TC OPEN 
10045  TC no 04 TC LOW 
10046  TC no 04 LO OOR 
10047  TC no 04 HI OOR 
10048  TC no 04 TC OPEN 
10049  TC no 05 TC LOW 
10050  TC no 05 LO OOR 
10051  TC no 05 HI OOR 
10052  TC no 05 TC OPEN 
10053  TC no 06 TC LOW 
10054  TC no 06 LO OOR 
10055  TC no 06 HI OOR 
10056  TC no 06 TC OPEN 
10057  TC no 07 TC LOW 
10058  TC no 07 LO OOR 
10059  TC no 07 HI OOR 
10060  TC no 07 TC OPEN 
10061  TC no 08 TC LOW 
10062  TC no 08 LO OOR 
10063  TC no 08 HI OOR 
10064  TC no 08 TC OPEN 
10065  TC no 09 TC LOW 
10066  TC no 09 LO OOR 
10067  TC no 09 HI OOR 
10068  TC no 09 TC OPEN 
10069  TC no 10 TC LOW 
10070  TC no 10 LO OOR 
10071  TC no 10 HI OOR 
10072  TC no 10 TC OPEN 
10073  TC no 11 TC LOW 
10074  TC no 11 LO OOR 
10075  TC no 11 HI OOR 
10076  TC no 11 TC OPEN 
10077  TC no 12 TC LOW 
10078  TC no 12 LO OOR 
10079  TC no 12 HI OOR 
10080  TC no 12 TC OPEN 
10081  TC no 13 TC LOW 
10082  TC no 13 LO OOR 
10083  TC no 13 HI OOR 
10084  TC no 13 TC OPEN 
10085  TC no 14 TC LOW 
10086  TC no 14 LO OOR 
10087  TC no 14 HI OOR 
10088  TC no 14 TC OPEN 
10089  TC no 15 TC LOW 
10090  TC no 15 LO OOR 
10091  TC no 15 HI OOR 
10092  TC no 15 TC OPEN 
10093  TC no 16 TC LOW 
10094  TC no 16 LO OOR 
10095  TC no 16 HI OOR 
10096  TC no 16 TC OPEN 
10097  TC no 17 TC LOW 
10098  TC no 17 LO OOR 
10099  TC no 17 HI OOR 
10100  TC no 17 TC OPEN 
10101  TC no 18 TC LOW 
10102  TC no 18 LO OOR 
10103  TC no 18 HI OOR 
10104  TC no 18 TC OPEN 
10105  TC no 19 TC LOW 
10106  TC no 19 LO OOR 
10107  TC no 19 HI OOR 
10108  TC no 19 TC OPEN 
10109  TC no 20 TC LOW 
10110  TC no 20 LO OOR 
10111  TC no 20 HI OOR 
10112  TC no 20 TC OPEN 
10113  TC no 21 TC LOW 
10114  TC no 21 LO OOR 
10115  TC no 21 HI OOR 
10116  TC no 21 TC OPEN 
10117  TC no 22 TC LOW 
10118  TC no 22 LO OOR 
10119  TC no 22 HI OOR 
10120  TC no 22 TC OPEN 
10121  TC no 23 TC LOW 
10122  TC no 23 LO OOR 
10123  TC no 23 HI OOR 
10124  TC no 23 TC OPEN 
10125  TC no 24 TC LOW 
10126  TC no 24 LO OOR 
10127  TC no 24 HI OOR 
10128  TC no 24 TC OPEN 
10129  CH no 01 DEV ALM 
10130  CH no 01 HI1 ALM 
10131  CH no 01 HI2 ALM 
10132  CH no 01 HI ALM 
10133  CH no 02 DEV ALM 
10134  CH no 02 HI1 ALM 
10135  CH no 02 HI2 ALM 
10136  CH no 02 HI ALM 
10137  CH no 03 DEV ALM 
10138  CH no 03 HI1 ALM 
10139  CH no 03 HI2 ALM 
10140  CH no 03 HI ALM 
10141  CH no 04 DEV ALM 
10142  CH no 04 HI1 ALM 
10143  CH no 04 HI2 ALM 
10144  CH no 04 HI ALM 
10145  CH no 05 DEV ALM 
10146  CH no 05 HI1 ALM 
10147  CH no 05 HI2 ALM 
10148  CH no 05 HI ALM 
10149  CH no 06 DEV ALM 
10150  CH no 06 HI1 ALM 
10151  CH no 06 HI2 ALM 
10152  CH no 06 HI ALM 
10153  CH no 07 DEV ALM 
10154  CH no 07 HI1 ALM 
10155  CH no 07 HI2 ALM 
10156  CH no 07 HI ALM 
10157  CH no 08 DEV ALM 
10158  CH no 08 HI1 ALM 
10159  CH no 08 HI2 ALM 
10160  CH no 08 HI ALM 
10161  CH no 09 DEV ALM 
10162  CH no 09 HI1 ALM 
10163  CH no 09 HI2 ALM 
10164  CH no 09 HI ALM 
10165  CH no 10 DEV ALM 
10166  CH no 10 HI1 ALM 
10167  CH no 10 HI2 ALM 
10168  CH no 10 HI ALM 
10169  CH no 11 DEV ALM 
10170  CH no 11 HI1 ALM 
10171  CH no 11 HI2 ALM 
10172  CH no 11 HI ALM 
10173  CH no 12 DEV ALM 
10174  CH no 12 HI1 ALM 
10175  CH no 12 HI2 ALM 
10176  CH no 12 HI ALM 
10177  CH no 13 DEV ALM 
10178  CH no 13 HI1 ALM 
10179  CH no 13 HI2 ALM 
10180  CH no 13 HI ALM 
10181  CH no 14 DEV ALM 
10182  CH no 14 HI1 ALM 
10183  CH no 14 HI2 ALM 
10184  CH no 14 HI ALM 
10185  CH no 15 DEV ALM 
10186  CH no 15 HI1 ALM 
10187  CH no 15 HI2 ALM 
10188  CH no 15 HI ALM 
10189  CH no 16 DEV ALM 
10190  CH no 16 HI1 ALM 
10191  CH no 16 HI2 ALM 
10192  CH no 16 HI ALM 
10193  CH no 17 DEV ALM 
10194  CH no 17 HI1 ALM 
10195  CH no 17 HI2 ALM 
10196  CH no 17 HI ALM 
10197  CH no 18 DEV ALM 
10198  CH no 18 HI1 ALM 
10199  CH no 18 HI2 ALM 
10200  CH no 18 HI ALM 
10201  CH no 19 DEV ALM 
10202  CH no 19 HI1 ALM 
10203  CH no 19 HI2 ALM 
10204  CH no 19 HI ALM 
10205  CH no 20 DEV ALM 
10206  CH no 20 HI1 ALM 
10207  CH no 20 HI2 ALM 
10208  CH no 20 HI ALM 
10209  CH no 21 DEV ALM 
10210  CH no 21 HI1 ALM 
10211  CH no 21 HI2ALM 
10212  CH no 21 HI ALM 
10213  CH no 22 DEV ALM 
10214  CH no 22 HI1 ALM 
10215  CH no 22 HI2 ALM 
10216  CH no 22 HI ALM 
10217  CH no 23 DEV ALM 
10218  CH no 23 HI1 ALM 
10219  CH no 23 HI2 ALM 
10220  CH no 23 HI ALM 
10221  CH no 24 DEV ALM 
10222  CH no 24 HI1 ALM 
10223  CH no 24 HI2 ALM 
10224  CH no 24 HI ALM 
10225 to 10256  Reserved 

Table 4
30000 Modbus Registers 
Register  Description 
30001  InStat 001-016 
30002  InStat 017-032 
30003  InStat 033-048 
30004  InStat 049-064 
30005  InStat 065-080 
30006  InStat 081-096 
30007  InStat 097-112 
30008  InStat 113-128 
30009  InStat 129-144 
30010  InStat 145-160 
30011  InStat 161-176 
30012  InStat 177- 192 
30013  InStat 193-208 
30014  InStat 209-224 
30015  InStat 225-240 
30016  InStat 241-256 
30017  TC 01 DEG K x 10 
30018  TC 02 DEG K x 10 
30019  TC 03 DEG K x 10 
30020  TC 04 DEG K x 10 
30021  TC 05 DEG K x 10 
30022  TC 06 DEG K x 10 
30023  TC 07 DEG K x 10 
30024  TC 08 DEG K x 10 
30025  TC 09 DEG K x 10 
30026  TC 10 DEG K x 10 
30027  TC 11 DEG K x 10 
30028  TC 12 DEG K x 10 
30029  TC 13 DEG K x 10 
30030  TC 14 DEG K x 10 
30031  TC 15 DEG K x 10 
30032  TC 16 DEG K x 10 
30033  TC 17 DEG K x 10 
30034  TC 18 DEG K x 10 
30035  TC 19 DEG K x 10 
30036  TC 20 DEG K x 10 
30037  TC 21 DEG K x 10 
30038  TC 22 DEG K x 10 
30039  TC 23 DEG K x 10 
30040  TC 24 DEG K x 10 
30041  AMB DEG K x 10 
30042  CYL AVG DEG K x 10 
30043  DIF.01 DEG K x 10 
30044  DIF.02 DEG K x 10 
30045  DIF.03 DEG K x 10 
30046  DIF.04 DEG K x 10 
30047  DIF.05 DEG K x 10 
30048  DIF.06 DEG K x 10 
30049  DIF.07 DEG K x 10 
30050  DIF.08 DEG K x 10 
30051  DIF.09 DEG K x 10 
30052  DIF.10 DEG K x 10 
30053  DIF.11 DEG K x 10 
30054  DIF.12 DEG K x 10 
30055  DIF.13 DEG K x 10 
30056  DIF.14 DEG K x 10 
30057  DIF.15 DEG K x 10 
30058  DIF.16 DEG K x 10 
30059  DIF.17 DEG K x 10 
30060  DIF.18 DEG K x 10 
30061  DIF.19 DEG K x 10 
30062  DIF.20 DEG K x 10 
30063 to 30066  Reserved 
30067  Supply volts x 10 
30068 to 30086  Reserved 
30087  Timer MIN:SEC 
30088  Max Channel 
30089  Max DEG K x 10 
30090  Alarm Log (new) 
30091  Alarm Log 2 
30092  Alarm Log 3 
30093  Alarm Log (old) 
30094 to 30128  Reserved 

Table 5
40000 Modbus Registers 
Register  Description  Range  Default 
40001  Coils 001-016  00000-65535  00002 
40002  Coils 017-032  00000-65535  00000 
40003  Coils 033-048  00000-65535  01799 
40004  Coils 049-064  00000-65535  05163 
40005  Coils 065-080  00000-65535  00000 
40006  Coils 081-096  00000-65535  00000 
40007  Coils 097-112  00000-65535  00000 
40008  Coils 113-128  00000-65535  00000 
40009  Coils 129-144  00000-65535  00000 
40010  Coils 145-160  00000-65535  00000 
40011  Coils 161-176  00000-65535  00000 
40012  Coils 177-192  00000-65535  00000 
40013  FILTER 1-255  00001-00255  00195 
40014  CYLINDERS 1-20  00001-00024  00016 
40015  TURBOS 0,2,4  00000-00004  00002 
40016  TIO=0 TO=1 TI=2  00000-00002  00001 
40017  ARM TIME MIN  00000-00099  00015 
40018  ARM TEMP DEG K  02130-11230  06730 
40019  CYL DEV DEG K  00000-11230  00000 
40020  CYL HI1 DEG K  02130-11230  02730 
40021  CYL HI2 DEG K  02130-11230  02730 
40022  TO HI1 DEG K  02130-11230  02730 
40023  TO HI2 DEG K  02130-11230  02730 
40024  TI HI DEG K  02130-11230  02730 
40025 to 40128  Reserved  00000-65535  00000 

Caterpillar Information System:

Test Specifications for Vane Cartridges{0784, 5058, 5070} Test Specifications for Vane Cartridges{0784, 5058, 5070}
2007/02/05 A Conversion Kit for the Status Control Panel is Available {1408}
C11 and C13 Engines Turbocharger
C27 and C32 Generator Set Engines Vibration Damper and Pulley
G3508B, G3512B, G3512B, G3516B and G3520B Petroleum Engines Exhaust Manifold - Install
3500C Marine Auxiliary Engines Engine Control Switch - Test
3500C Marine Auxiliary Engines Sensor Signal (Analog, Active) - Test
3500B Industrial Engines Maintenance Recommendations
2007/05/14 New Circuit Breakers Are Now Available {1420}
G3508B, G3512B, G3512B, G3516B and G3520B Petroleum Engines Exhaust Manifold - Remove
3500C Marine Auxiliary Engines Emergency Stop (Remote) - Test
3500C Marine Auxiliary Engines Emergency Stop - Test
C9 Engine for the 816F Series 2 Landfill Compactor, the 815F Series 2 Soil Compactor, and the 814F Series 2 Wheel Dozer Speed/Timing - Test
C0.5, C0.7, C1.1, C1.5, C1.6 and C2.2 Industrial Engines Starting the Engine
TH55FT-E70 and TH55FT-E90 Petroleum Transmissions Power Train Hydraulic System
TH55FT-E70 and TH55FT-E90 Petroleum Transmissions Torque Converter
C4.4 (Mech) Industrial Engine Piston Cooling Jet
3500C Marine Auxiliary Engines Injector Solenoid - Test
3500C Marine Auxiliary Engines Prelubrication - Test
2008/02/11 The Heavy Pistons are Cancelled {1214, 1225}
2013/02/27 New Fuel Pressure Regulators are Now Available {1715}
2007/02/05 New Fuel Pressure Regulators are Now Available {1715}
2007/02/01 New Fuel Pressure Regulators are Now Available {1715}
3500B Industrial Engines Instrument Panel
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