XTC601 User's Manual
Appendix D
Modbus Register Map (standard version)
Compatible with XTP601 Firmware Version: V1:03
Addr
Function
0
Modbus Instrument Address (ID)
1
Settings Register
2
Display Contrast / Brightness
Units Register
3
(Tempr, Pressure, Ext Sens, Param, etc)
4
Chart Interval
5
Spare
6
Alarm 1 (Lo alarm) Set point
7
Alarm 2 (Hi alarm) Set point
8
Range Zero (Ch1 output zero)
9
Range Span (Ch1 output span)
10
CH1 comp coefficient 20%
11
CH1 comp coefficient 40%
12
CH1 comp coefficient 60%
13
CH1 comp coefficient 80%
14
CH1 comp coefficient 100%
15
N2 VCOMP ADC (for ratio comp)
16
BACKG VCOMP ADC (for ratio comp)
17
BACKG ZERO (for zero offset value)
18
BACKG SPAN (for ratio gas value)
19
BACKG CAL VALUE (for ratio gas value)
20
CH2 Input (Ext Sensor) zero
21
CH2 Input (Ext Sensor) span
22
Main gas in application
23
Cell Tempr Set point
24
PID Proportional Term
25
PID Integral Term
26
PID Derivative Term
27
Alarm Configuration
28
Spare
29
Field Cal Reference 1
30
Field Cal Actual 1
31
Field Cal Reference 2
32
Spare
33
Spare
34
Language
35
Bridge Pot Wiper Code
36
Gain Pot Wiper Code
37
Field Cal Actual 2
38
Cal Ref1
39
Cal Ref2
Michell Instruments
Access
Ranges/Resolution
R/W
1-127
R/W
0-65535
R/W
0-100% / 0-100%, 10% steps
R/W
See reg details
R/W
2-60 sec, in 2 sec intervals
Instrum range min
R/W
Instrum range max, 0.01
Instrum range min
R/W
Instrum range max, 0.01
R
0.00 to Range Span
R
Range Zero to 100.00
R/W
0.50-2.00
R/W
0.50-2.00
R/W
0.50-2.00
R/W
0.50-2.00
R/W
0.50-2.00
R
0-8191
R
0-8191
R
-10.00-10.00 %
R
0.00-100.00 %
R
0.00-100.00 %
R/W
See reg details
R/W
See reg details
R/W
R
40-70 C
R
1-20000
R
1-500
R
1-100
R/W
See reg details
Instrum range min to Instrum
R/W
range max + 20% of range, 0.01
R/W
-199.99-199.99
Instrum range min to Instrum
R/W
range max + 20% of range, 0.01
R/W
0-15
R
0-1023
R
0-1023
R/W
-199.99-199.99
R
0.00-100.00
R
0.00-100.00
APPENDIX D
Type
A
B
C
D
A
G
G
G
G
G
G
G
G
G
A
A
G
G
G
F
F
0.6
A
A
A
A
A
L
G
G
G
A
A
A
G
G
G
49
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