Table 4: Modbus™ Special Registers - Teledyne 700 IR Series Instruction Manual

700 IR Series
INFRARED GAS DETECTOR FOR COMBUSTIBLE AND CO
GASES
USER MANUAL
FC REG Content Description
03 40010 Read Temperature
03/06 40011 Special #1
03/06 40012 Special #2
03 40013 Special #3
03/06 40014 Special #4
03 40015 Calibration Status
06 40015 Calibration Enable
03 40016 Read Text 1, first char in L
03 40017 Read Text 2
03 40018 Read Text 3
03 40019 Read Text 4
03 40020 Read Text 5, last char in H
03 40021 Text null terminator in L
1 Integer ranges from 1 all the way to 10,000.
2 Units are determined by "units" field in the "notation" string
(x 1)
3 Gas Reading times one
notation string for "Low Range" = 1. Gas Reading times one
Span Gas must be less than or equal to Detectable Range and is usually about ½ of it.
4
Fault status bits self-reset when fault clears
5
6 Text in ASCII, in order L byte, H byte, L byte... See field descriptions of notation string.
Gas/Units String
Character #
Description
Units – This field is 'PPM', 'PPB', or '_ _ %' (where ' _ ' is a space, 0x20).
0x20 – The units filed is terminated with an ASCII space (0x20)
Gas Type – This field contains the gas type of the cell. Any ASCII string is permissible
0x00 – The notation string is terminated with an ASCII null character
REG
40011 Gas Factor (R/W)
Range = 79 to 565
40012 Cal Factor (R/W)
Range = 79 to 565
40013 Bridge Current (mA)
40014 Bridge Voltage (mV)
(Read only)
1 Only possible ranges are 20, 50, 100, 200. Modbus register 40001 will contain either 20, 50, 100, or 200, range divisor
is not necessary.
34
R/W
Value
R 28
R/W
R/W
R
R/W
R 0x0000
0x0001
0x0002
0x0003
0x0004
W 0x0001
0x0002
0x0008
0x0009
0x000A
0x000B
R
R
R
R
R
R
with units in notation string for "Low Range" = 0. Gas Reading times one
(x 100)
1 2 3 4
Units 0x20
Table 4: Modbus™ Special Registers
FP (40006 = 2)
2
Content Definition
Meaning
28 °C
Function dependent on value of 40006
(See Special Register Table 4)
Function dependent on value of 40006
(See Special Register Table 4)
Function dependent on value of 40006
(See Special Register Table 4)
Function defendant on value of 40006
(See Special Register Table 4)
Idle
Zero Calibration Started
Span Calibration Started
Span Set
Span Calibration Unsuccessful
Set Zero
Set Span
Signal simulation mode
Set OLCT 700/710 FP Bridge Voltage
Set OLCT 700/710 TP Heater Power
Set OLCT 700/710 IR Gain
Two Char of Gas/Units String 6
Two Char of Gas/Units String 6
Two Char of Gas/Units String 6
6
Two Char of Gas/Units String
6
Two Char of Gas/Units String
6
Two Char of Gas/Units String
with units in notation string for "Low Range" = 2.
5 6 7 8
Gas Type
IR (40006 = 3)
Gas Factor (R/W) Heater Power (mW) (R/W)
Range = 20 to 565
Active Counts Heater Voltage (mV)
Reference Counts Sensor Resistance (x100 Ω)
Range Divisor Heater Current (mA )
1,10,100, or 1000
Range
(x 10)
with units in
9 10 11
0x00
TP (40006 = 4) 1
NP700IRIMEN
Revision E.0