RKI Instruments Digester Gas Monitor - Manual (Page 80)

74 • Supported Modbus Functions Digester Gas Monitor Operator’s Manual
Registers 40014 - 40015
The 4 bytes (characters) in registers 40014 and 40015 contain the channel gas units in
ASCII characters.
Registers 40016 - 40029, Channel 2 Information
Register 40016
Table 16 below shows the information in register 40016.
Registers 40017 & 40018
The 32 bits in registers 40017 and 40018 contain the channel 2 numerical reading in
single precision floating point IEEE format.
Register 40019
The 16 bits in register 40019 contain the channel 2 numerical reading in integer form
omitting the sign (+ or -) and the decimal point.
Register 40020
Table 17 below shows the information in register 40020.
Registers 40021 - 40024
The 8 bytes (characters) in these registers contain the channel gas name in ASCII
characters.
Table 16: Register 40016
Channel Operational State
(MS-Byte)
Channel Status Bits
(LS-Byte)
• 0 = (this code is not used)
• 1 = Standby
• 2 = Normal Operation
• 3 = Warm Up
• 4 = Fail
• 5 = Post-Calibration
• 6 = Low Power
• Bit-7 (msb) = Relay-1 (1 = energized)
• Bit-6 = Relay-2 (1 = energized)
• Bit-5 = (this bit is not used)
• Bit-4 = Alarm-1 (1 = asserted)
• Bit-3 = Alarm-2 (1 = asserted)
• Bit-2 = Alarm-3 (1 = asserted)
• Bits[1:0] = Channel Usage Code
[00] = Not Used
[01] = Standby
[10] = Active
[11] = unused code
Table 17: Register 40020
Channel Reading Sign (+/-)
(MS-Byte)
Channel Decimal Point Position
(LS-Byte)
• 0 = Positive (+)
• 1 = Negative (-)
• 0 = No Decimal Point
• 1 = .x
• 2 = .xx
• 3 = .xxx