WTE TReX-460, Руководство пользователя

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TReX User Manual v15.30 Firmware
PLC Support
An optional feature of the TReX-460 is a telemetry-optimised PLC. This allows automated
control of outputs and transmissions based on configurable inputs, received messages,
counters, comparators and timers. This PLC utility uses a ladder logic interface similar to other
commercially available PLC devices.
!
WARNING
PLC OPERATION AUTO-STARTS
When the PLC has been enabled, then on system restart or loss of power, the PLC reverts to initial
program state. This means that all counters, and work bits reset to default states. Hold bits will retain
values, but if power has been off for more 3 days, system clocks and hold bits may reset to default
values.
Ensure that default output states have been fully understood, and that on power loss PLC program
returns equipment to a safe initial state.
DO NOT use hold bits to directly operate any device if the device is not safe to be energised
immediately on PLC restart.
Failure to follow these instructions can result in death or serious injury
!
WARNING
USE OF EMERGENCY/CRITICAL CONTROLS
Critical system controls, such as emergency stops must not be wired through the PLC as a sole means
of safely stopping equipment. Any critical system that must disable the system must operate
separately from the PLC!
Failure to follow these instructions can result in death or serious injury
Program execution is from the first rung to the last. All output flags are set immediately after
evaluating each rung, that may in turn be used to influence later rungs.
!
CAUTION
Changes to used radio data rates result in how quickly inputs are read and outputs can be set.
Please view PLC latency specifications to ensure the TReX is configured and used
appropriately for the intended application.
This section provides a technical overview of the feature, instruction on it’s use and multiple
© WTE Limited, 2022 – Christchurch New Zealand
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