DAMPER GP 4W2556 - Caterpillar

J1939 Network Connection Group
The J1939 network connection provides a standard "CAN" bus connection operating at a 250,000 baud rate. The J1939 network connection group must be connected to implement the PEM communication ECM’s J1939 to Modbus feature. Reference the "J1939 Communications Wiring Requirements" section for specific wiring requirements. The CAN A or CAN 1 is the correct CAN wiring. CAN B or CAN 2 is not to be used.J1939 Communications Wiring Requirements
The J1939 communications connection provides a connection between PEMS ECM and the J1939 network. The J1939 network contains a bus along with wiring to connect the nodes to the bus. The bus is terminated with a 120 ohm resister on each end to complete the network. Refer to Table 5 for the J1939 network parameters.Note: When connecting the J1939 / CAN wires from the PEMS ECM to the piece of equipment, ensure that the wires are connected to the CAN 1 / Global CAN wires on the equipment. Some pieces of equipment will have other connections labeled CAN 2 / Local CAN. If the PEMS ECM is connected to the wrong CAN connection, the proper data will not be recorded and sent to user interface.
Table 5
J1939 Port Characteristics
Value
Parameter Shielded (SAE J1939 -11) Unshielded (SAE J1939 -15)
Maximum Nodes (n) 30 10
Maximum length of the Bus (L 40 m (131.23 ft)
Maximum length of the Stub Wire (S) 1 m (3.28 ft) 3 m (9.84 ft)
Node Distance (d) 0.1 m (0.328 ft) to 40 m (131.23 ft)
Minimum Distance to Terminating Resistor (d) 0.0 m (0.000 ft)
Terminating Resistors 120 Ohm, 0.4 W J1939 Port Characteristics
Illustration 37 g01157211
Typical J1939 communications network layout
Resistance Check
With the system installed and the customer wiring connected to the 6-pin connector on the ECM mounting bracket, check the resistance of the data link on the service tool connector on the side of the ECM bracket. The data link resistance between pins F and G should be approximately 60 +/- 10 ohms.If the resistance of the wiring harness is not within specification, refer to Troubleshooting, M0078614, "Service Tool Does Not Communicate".Flash the PEMS ECM
Note: Use the most recent software flash file available on SIS web.The ECM is flashed to upgrade the software. Flash programming of the ECM must also be done if the ECM has been replaced. The Cat® Electronic Technician (ET) contains the program WinFlash. WinFlash is used to load software into the ECM.Using Winflash, connect to the PEMS ECM and install the most recent flash file available on SIS web. Refer to Systems Operation and Troubleshooting, M0078614 for additional information.Programming the PEMS ECM
The ECM must be programmed to include information specific to the installation.Items that must be programmed:
Product ID: Engine Serial Number
Equipment ID: Trailer VIN number
Machine Serial Number: This is used to set the VIN for the trailer that the pump is on. This value must be set to identify the trailer that the pump is part of.
Well Stimulation Pump Fluid End Serial Number: This is used to set the serial number of