VALVE GP-TRANSMISSION CONTROL 3547569 - Caterpillar

Illustration 1 g03347645Example of a Customer Supplied Radio
Field Conditions
Existing GNSS base station that is compatible with the Cat Grade Control system
Customer supplied radio at the GNSS base stationRequired
Ensure the following when you create or obtain a cable that connects a compatible customer supplied radio to the Cat Grade Control system.
Verify that the supplied radio is compatible with Cat Grade Control System (can communicate "CMR" data over the "RS-232"serial cable Wires to the Cat Grade Control System).
Verify that the machine radio operates within 9 VDC to 32 VDC.Note: Verify that all the necessary connections can operate at machine voltages.Note: In order for the radio to function properly with the system, connect the DTR line to V+ and Limit the voltage to 25V DC
If its needed Use a 240-2735 Power Converter to step the voltage down to 12 VDC.
Using the radio manufactures information, connect the following wires :
Power
Ground
TXD
RXD
DTR (Data Terminal Read)Note: DTR is required by this example to make the radio active.
Using the referenced pinouts for the machine harness, wire the following for the machine harness connector:
Power
Ground
COM2 TXD
COM2 RXD
Configure the machine radio and the Cat Grade Control system to communicate over RS232.Reference: Reference Systems Operation, KENR5956, "Radio Utility".
Change the settings to ensure that the customer supplied radio and the display match.Default settings for the displayBaud rate ... 38400Data Bits ... 8 (Fixed setting on display)Parity ... NoneStop Bits ... 1 (Fixed setting on display)
Verify that the over-the-air data/communications rate is set the same in both the base radio and the machine radio.The optimal rate may vary depending on the radio. Typically the rate is between 4800 bps and 38400 bps. The same rate must be set in both the base radio and the machine radio. Proceed if the same rate is set. If the rates are not the same, use the radio configuration software to set both radios to the same over-the-air data/communications rate.
Connect the new adapter harness to the main harness and to the machine radio.
Apply power to the system and verify the communication to the base radio.Use the display to check the"Left data link". The value should be increasing for the integrity. If the value is not increasing, refer to the "Troubleshooting" section below.Information Checklist for Third-Party Radio
Table 1
Obtain the manual from the manufacturer of the radio.
Verify that the radio communicates Compact Measurement Records (CMRs) over RS232. Verify that the settings can be changed to match the display.
Review the power requirements for the radio. Review any special requirements. machine power may run to 28VDC
Validate the settings of the radio to communicate with the base radio. Radio channel
Over-the-air data rate
Find the pin identification for the radio.
Create a simple schematic from the information that was collected. The schematic should show which pin on the radio connects to the pin on machine connector.
Use the simple schematic to build the harness.
Install the harness on machine. Verify power to the radio when the system is turned on.
Verify that the Cat Grade Control system is receiving CMRs from the base station. Troubleshooting
No Power