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F-5500 Thermal Mass Flow Meter Manual 06/17 - 2030 / 107023
Page 65
Model F-5500
COMMUNICA
TIONS
Model F-5500
COMMUNICA
TIONS
F-5500 Commands Supported by Modbus
Bit
Definition
Comment
0
Power up indication
Cleared when out of the power up sequence
1
Flow rate reached high limit threshold
Set limit to zero to disable
2
Flow rate reached low limit threshold
Set limit to zero to disable
3
Temperature reached high limit threshold
Set limit to zero to disable
4
Temperature reached low limit threshold
Set limit to zero to disable
5
Sensor reading is out of range
Check sensor wiring
6
Gas mix error
Gas mix must total 100%
7
Incorrect Settings
Check settings
8
In simulation mode
Set simulation value to 0 to disable
9
Pulse/alarm output is out of range
Check pulse/alarm output settings
10
Analog 4-20 mA for flow/temp is out of range
Check analog output settings
11
Not used
Not used
12
Not used
Not used
13
Not used
Not used
14
CRC error
Check parameters and reset CRC
15
Error in Total
Reset total to clear alarm
Table 5.3: Status 2 Bits Definitions for Command 04, Modbus Address 30002
Bit
Definition
Comment
0
Pulse hardware detected
1
Busy
Busy
2
Not used
Not used
3
Not used
Not used
4
Zero CAL-CHECK in process
5
Zero CAL-CHECK fail
6
Zero CAL-CHECK aborted
7
Zero CAL-CHECK warning
Table 5.2: Status Bits Definitions for Command 04, Modbus Address 30001
Preset Single
Register
Preset Single Register (Command 06)
This command is used to perform miscellaneous functions such as clearing the
totalizer and elapsed time. The register address is Modbus=40018 and the data to
write is described below.
Request:
<Meter Address> <Command code=06> <Register address high=0x00>
<Register address low=0x11> <Register data high=0x00> <Register data low
=0x02> <CRC high> <CRC low>
