Coils
Chapter 5 Modbus Protocol
MiniCapt Remote Microbial Air Sampler Operations Manual
Page 5-11
00/09:
Sample Volume Mode. The sample volume control will change how the unit
controls sampling. If set, holding register 40003 will contain the sample volume to
be processed multiplied by a factor of 100. If clear, holding register 40003 will
contain the sample interval to be processed in seconds. This value can also be
changed from the display. It is recommended that the coil selection be set every-
time the holding registers are sent.
Read: 1=Sample Volume, 0=Sample Interval
Write: 1=Sample Volume, 0=Sample Interval
00/10 -
00/32:
Spare.
Table 5-4
Coils
Coils
Description (Coils)
Comment
00/01
Data Collection
On/Off
Sampling Control
00/02
Data Available
Yes/No
Data Available/Queue Control
00/03
Data Clear
Toggle
Data Queue Delete
00/04
Reset Sensor
Toggle
Reset control
00/05
Status LED: Green
On/Off
Status LED: Green Control
n/a
00/06
Status LED: Red
On/Off
Status LED: Red Control
n/a
00/07
External Alarm
On/Off
External alarm
n/a
00/08
IEEE-754 Float
On/Off
Modbus Float representation
00/09
Volume Mode
On/Off
Sample Volume or Interval
Spare
23 spare coils
Reserve “common” coils
Read: Always 0
Write: No effect