Tracks state of multiple relays. More...
#include <Device.h>
Public Attributes | |
| BitSet32 | channelMask |
| Identifies valid channels. More... | |
| BitSet32 | channelStates |
Detailed Description
Tracks state of multiple relays.
Created on: 1 May 2018
Copyright 2022 mikee47 mike@sillyhouse.net
This file is part of the IOControl Library
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R421A08 modbus 8-channel relay board
Channels are numbered 1 - 8. This is the 16-bit address field in a request.
To simplify operation we use a bitmask to specify relay states. We use the channel number directly so values can range between 0x0001 and 0x01FE
The query command returns a range of states, but other commands work with only a single channel. We therefore implement a mechanism to iterate through all requested channels using the same request.
There is a similar 4-channel board but with no markings and (as yet) no documentation. However all commands appear to work so a designation of R421A04 seems appropriate. Some typos in the 8-channel datasheet indicate that it was adapted from that of a 4-channel version.
R421A04 - 32 addresses set with DIP1-5, DIP6 ON for RTU mode R421A08 - 64 addresses set with DIP1-6, RTU mode only
Member Data Documentation
◆ channelMask
| BitSet32 StateMask::channelMask |
Identifies valid channels.
◆ channelStates
| BitSet32 StateMask::channelStates |
The documentation for this struct was generated from the following file:
