The Multi Point Controller (MPC) firmware version 2.03 has some great improvements.
We have added the ability to configure the behaviour of digital outputs on the MPC under fault conditions such as comms failure. The outputs can now be configured to be turned off (RELEASE) or held in their current state (HOLD) in the event of a fault based on your system requirements and preference.
The update also provides additional comms failure handling to reset and reinitialise the MPC radio module configuration in the event of loss of radio communications to a slave device (WP2P).
New MPC Comms Fail Configuration.
The MPC settings are configured in QTech Workbench but importantly QTech Workbench V2.11 or later must be used. Please click here to download the latest version of Workbench.
Introduces a failsafe reset mechanism so that if persistent comms failure occurs on ALL links to remotes five times in a row, the MPC will also fully reinitialise the radio module and reset the main processor. The additional effect of this is that all outputs on the MPC are reset. This is the equivalent of the unit repowering.
More details about the MPC are in this updated user guide.
We have also published a system designer guide which includes comprehensive functional details and design ideas such as:
QTech recommends that the HOLD function be invoked where possible to avoid the effect of short or bursty communication failures.
In addition, at least one output on the MPC should be dedicated to monitoring comms fail faults so that if they persist or of a long duration further action can be taken by a PLC, RTU, alarm messaging service or fail-safe controls.
Remote units that are turned off for any length of time (or temporarily out of service) should be dealt with by modifying the MPC I/O configuration to ignore the remote. Otherwise they will appear to show as comms failures.
Alternatively, if there is sufficient I/O available, links can be monitored using a signal or a loopback at the remote or the MPC to check for continuity over the radio link and therefore if continuity is broken then implement alarm or contingency measures. If a loopback signal breaks, for example, local pump control can be instigated to avoid low pressure, or high-pressure faults. Loopbacks are also used to cycle the power on devices as a means of resetting elements of the system.
Please get in touch to discuss how the MPC system can provide a radio link for your application.