TSI Instruments FHC50 User Manual

Modbus Communications (continued)
76 Appendix B
Feature
Holding
Register
(Decimal)
Range
Unit
Read /
Write
Notes
Not Used
40052
N/A
N/A
R
Not used on
standard
configuration.
Not Used
40053
N/A
N/A
R/W
Not used on
standard
configuration.
Setback Control
Mode
40054
0, 1
0: Velocity
Sidewall Sensor
1: Face Velocity
Sash Position
2: Velocity
Sidewall Sensor
with Sash
Position
3: Flow
4: Fixed Position
R/W
Alarm Delay
40055
5-120
Seconds
R/W
EXAMPLE of 06 Write Single Register function format:
This example changes the normal low face velocity alarm set point to 60 ft/min.
QUERY RESPONSE
Field Name (Hex) Field Name (Hex)
Slave Address 01 Slave Address 01
Function 06 Function 06
Starting Address Hi 00 Starting Address Hi 00
Starting Address Lo 16 Starting Address Lo 16
Data Value (High) 00 Error Check (CRC) --
Data Value (Low) 3C
Error Check (CRC) --
EXAMPLE of 03 Read Holding Registers function format:
This example reads the face velocity and current face velocity set point.
QUERY RESPONSE
Field Name (Hex) Field Name (Hex)
Slave Address 01 Slave Address 01
Function 03 Function 03
Starting Address Hi 00 Byte Count 04
Starting Address Lo 00 Data Hi 00
No. Of Registers Hi 00 Data Lo 64 (100 ft/min)
No. Of Registers Lo 02 Data Hi 00
Error Check (CRC) -- Data Lo 64 (100 ft/min)
Error Check (CRC)

TSI Instruments FHC50 Specifications

General

Brand	TSI Instruments
Model	FHC50
Category	Controller
Language	English