Polling Mode Options

These parameters only take effect for Polling Mode <K140,5> on the main RS-232 or RS-422 ports (not on the Auxiliary Port), and are completely independent of the ACK/NAK Options <K147>.

The values of protocol characters can be changed, but the protocol events cannot be disabled. The polling mode address is configured in the <K140> command.

To enable true multidrop protocol, the RS422/485 port must be enabled, <K102,1>, in order to turn the transmitter on and off. If RS-232 is enabled instead of RS422/485, <K102,0>, then Polling Mode will operate as a Point-to-Point polling protocol. This is because the RS-232 transmitter is always left on when enabled.

Note: See Polling Mode Data Flow Examples for sample Polling Mode communication scenarios.