modbus_rtu_set_rts_delay.md 665 B
modbus_rtu_set_rts_delay
Name
modbus_rtu_set_rts_delay - set the RTS delay in RTU
Synopsis
int modbus_rtu_set_rts_delay(modbus_t *ctx, int us);
Description
The modbus_rtu_set_rts_delay() function shall set the Request To Send delay
period of the libmodbus context 'ctx'.
This function can only be used with a context using a RTU backend.
Return value
The modbus_rtu_set_rts_delay() function shall return 0 if successful.
Otherwise it shall return -1 and set errno.
Errors
- EINVAL, the libmodbus backend is not RTU or a negative delay was specified.