Six digital Inputs/Outputs (I/O) are available on A0..A5 terminals in CoolEx-D45 and CoolEx-D412. I/O are controlled via corresponding coils, discrete inputs, holding register and input register (see Address Map). Each terminal can be set as output or input independently.
Terminal signal direction (input or output) is determined by last operation on corresponding MODBUS object.
Operation |
Output Enable |
Terminal Direction |
Result |
Write Coil to ON/OFF or Holding Register bit to 1/0 |
1 (Enable) |
Output |
Set Terminal output to high/low |
Read Coil or Holding Register |
No Change |
No Change |
Read Coil Value |
Read Discrete Input or Input Register |
0 (Disabled) |
Input |
Read input signal level |