54
Modbus register maps
A.2 Counter configuration
The configuration data block (Table 17) has parameters that directly affect the sampling
characteristics of the instrument. If a sample is active, any modifications to these
registers will restart the current sample.
Table 17 Configuration information
Address Register description Access Size (bytes) Data format
100 Modbus slave address R/W 2 1–247 (0 = broadcast)
101–102 Reserved
103 Sample mode R/W 2 1 = auto, 2 = manual
104 Sample control R/W 2 1 = run, 2 = stop
105 Sample cycles R/W 2 1–100, 0 = infinite
106 Sample period—hours R/W 2 H (0–23)
107 Sample period—minutes and seconds R/W 2 MS (0–59:0–59)
108 Hold period—hours R/W 2 H (0–23)
109 Hold period—minutes and seconds R/W 2 MS (0–59:0–59)
110 Delay period—hours R/W 2 H (0–23)
111 Delay period—minutes and seconds R/W 2 MS (0–59:0–59)
112 UTC—year R/W 2 YYYY (2000–2105)
113 UTC—month and day R/W 2 MD (1–12, 1–31)
114 UTC—hour R/W 2 H (0–23)
115 UTC—minute and second R/W 2 MS (0–59, 0–59)
116–119 Reserved
120 Active mode R/W 2 1 = active, 2 = inactive
121–126 Reserved
127 Location name R/W 32 Double byte characters (16)
143 Concentration mode R/W 2
0 = counts, 1 = counts/ft
3
,
2 = counts/L, 3 = counts/m
3
144 Count mode R/W 2 0 = cumulative, 1 = differential
145 Flow units R/W 2 0 = Lpm, 1 = cfm
146 Communication timeout—seconds R/W 2 12 hour maximum 1–43200 seconds
147 Protocol selection R/W 2
0 = FX, 1 = Modbus RTU, 2 = 48XX
compatibility mode
148 Channel 2 pulse out selection R/W 2 Count channel 2, 3 and 4
149 Light/LED indicator flash R/W 2 0 = steady, 1 = flashing
150 Red light/LED indicator R/W 2 0 = off, 1 = on
151 Green light/LED indicator R/W 2 0 = off, 1 = on
152 Yellow light/LED indicator R/W 2 0 = off, 1 = on
153 Blue light/LED indicator R/W 2 0 = off, 1 = on
154 Analog channel 1 full scale R/W 4 0–4,294,967,295
156 Analog channel 2 full scale R/W 4 0–4,294,967,295
158 Analog channel 3 full scale R/W 4 0–4,294,967,295
160 Analog channel 4 full scale R/W 4 0–4,294,967,295
162 Remote LCD R/W 2 0 = disable, 1 = enable
163–199 Expansion
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