RKI Instruments Digester Gas Monitor - Manual (Page 82)

76 • Supported Modbus Functions Digester Gas Monitor Operator’s Manual
Registers 40035 - 40038
The 8 bytes (characters) in these registers contain the channel gas name in ASCII
characters.
Registers 40039 - 40041
The 6 bytes (characters) in these registers contain the channel gas reading in ASCII
characters.
Registers 40042 - 40043
The 4 bytes (characters) in registers 40042 and 40043 contain the channel gas units in
ASCII characters.
Registers 40044 - 40057, Channel 4 Information
Register 40044
Table 20 below shows the information in register 40044.
Registers 40045 & 40046
The 32 bits in registers 40045 and 40046 contain the channel 2 numerical reading in
single precision floating point IEEE format.
Register 40047
The 16 bits in register 40047 contain the channel 2 numerical reading in integer form
omitting the sign (+ or -) and the decimal point.
Table 20: Register 40044
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