Do the functions of PLC pressure transmitters and variable frequency drives overlap in constant pressure control? Which one should be the main controller, and which one should provide feedback?

When troubleshooting a PLC pressure transmitter, how can you quickly tell whether it is a wiring issue or module damage?

When connecting a PLC pressure transmitter to a SCADA system, which integration method is more prone to communication timeouts during commissioning: Modbus RTU or Modbus TCP?