TSI Instruments FHC50

78 Appendix B
Supported Commands
Command
Response
Request Device ID
Returns 0x10
Synchronize Time Command
Acknowledged. There is no internal clock to synchronize.
Poll without/With Ack Message
Any change of status is returned
Read Analog Input Command
Variable value
Read Binary Input Command
Variable value
Read Analog Output Command
Variable Value
Write Analog Input
Acknowledge
Write Binary Input
Acknowledge
Write Analog Output
Acknowledge
Override Analog Input Command
Acknowledge
Override Binary Input Command
Acknowledge
Override Analog Output Command
Acknowledge
Override Release Request
Acknowledge
Identify Device Type Command
Returns 0x10H
Note: Poll Without/With Ack Message will need to be sent twice in order to receive all of the possible
change of status variables.
Variable Map
NPT
NPA
Feature
Unit
AI
1
Face Velocity
fpm, m/s
AI
2
Current Face Velocity Setpoint
fpm, m/s
AI
3
Flow Rate
cfm or L/s
AI
4
Current Flow Rate Setpoint
cfm or L/s
AI
5
Sash Position Percent
%
AI
6
Sash Open Area
ft
2
or m
2
AI
7
Damper or Valve Position
%
AO
1
Normal Face Velocity Setpoint
fpm, m/s
AO
2
Setback Face Velocity Setpoint
fpm, m/s
AO
3
Min. Damper Position
%
AO
4
Max. Damper Position
%
AO
5
Normal Flow Setpoint
cfm or L/s
AO
6
Setback Flow Setpoint
cfm or L/s
AO
7
Minimum Flow Setpoint
cfm or L/s
AO
8
Maximum Flow Setpoint
cfm or L/s
AO
9
Normal Low Face Velocity Alarm Setpoint
fpm, m/s
AO
10
Normal High Face Velocity Alarm Setpoint
fpm, m/s
AO
11
Normal Low Flow Alarm Setpoint
cfm or L/s
AO
12
Normal High Flow Alarm Setpoint
cfm or L/s
AO
13
Setback Low Face Velocity Alarm Setpoint
fpm, m/s
AO
14
Setback High Face Velocity Alarm Setpoint
fpm, m/s
AO
15
Setback Low Flow Alarm Setpoint
cfm or L/s