VALVE GP-CONTROL 4T5140 - Caterpillar

parameters for communication (rate of communication, parity, number of data bits, and number of stop bits) are stored in non-volatile memory within the CCM. To read the parameters for communication, follow these steps:
Power down the CCM by removing the wire that is connected to the +B terminal.
Power up the CCM by reconnecting the wire to the +B terminal. The display on the CCM will perform a lamp test (8.8.8.). The CCM will then display the communication protocol parameters (n81 9600 E00) that have been previously programmed.
Table 1
8.8.8. n81 9600 E00
8.8.8. All segments are turned on for a two second lamp test.
n81
n
8
1
No parity (default value)
Eight data bits (default value)
One stop bit (default value)
9600 Rate of Communication (default value)
E00 Error code for no fault codes in memory These parameters can be programmed to different values. Refer to "Setup Screen in the Caterpillar CCM PC For Windows: Getting Started Manual".