Lighthouse RLPC 0.1m, Руководство по эксплуатации

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Programming with MODBUS Protocol
248083227-1 Rev 8 7-7
Enable Alarming for a Channel
To enable alarming on the third particle channel, Enable Bit 1 for
register 43014.
To enable alarming on the second channel in addition to the third
channel, enable Bit 1 for register 43012. See Table 7-7.
To disable alarming completely, disable Bit 1 for register 43012 and
register 43014. Now, no channels are enabled for alarms.
Use the Threshold registers to set the alarm threshold value. This is
described in the next section.
Threshold Setup Registers
Threshold data is stored in the input registers in the 45xxx series which
are read/write. All threshold data items are 4 bytes long and are stored
across 2 registers. Byte and word ordering is big-endian.
For particle channels, the threshold value is a 32-bit unsigned integer.
If the data value exceeds the threshold value and the alarm is enabled
for that channel, the threshold flag in the Data Status register (30007-
30008, bit 4) is set.
The Data Status flag is set if any of the channels have a threshold
exceeded state as true.
43015 unsigned int Alarm Enable for Particle Channel 4 [high]
43016 unsigned int Alarm Enable for Particle Channel 4 [low]
Table 7-6 Alarm Enable Registers
Register Data Type Description
Table 7-7 Example of Alarming on Channel 2
Registers
Particle
Channel
Bit 1
Enabled
43009 - 43010 1 1
43011 - 43012 2 1
43013 - 43014 3 0
43015 - 43016 4 0