Network Communications
21
8610 Fume Hood Monitor
Variable Name
Variable
Address
Information Provided to
Master System
Integer DDC System
Receives
Model Number
0
Model Number
8610
Face Velocity
1
Fume Hood Face Velocity
Displayed in ft/min.
Status Index
2
Status of EverWatch device
0 Normal
1 Low Alarm
2 High Alarm
3 Sensor Error
5 Data Error
Low Alarm
3
Low Alarm Setpoint
Displayed in ft/min.
High Alarm
4
High Alarm Setpoint
Displayed in ft/min.
EXAMPLE of
04 Read Input Registers
function format.
This example read variable addresses 1 and 2 (Face Velocity and Status Index).
QUERY
RESPONSE
Field Name
(Hex)
Field Name
(Hex)
Slave Address
01
Slave Address
01
Function
04
Function
04
Starting Address Hi
00
Byte Count
04
Starting Address Lo
01
Data Hi Addr0
00
No. Of Points Hi
00
Data Lo Addr0
64 (100 ft/min)
No. Of Points Lo
02
Data Hi Addr1
00
Error Check (CRC)
--
Data Lo Addr1
00 (Normal- No Alarm)
Error Check (CRC)
--
EXAMPLE of
06 Preset Single Register
function format.
This example changes the low alarm setpoint to 60 ft/min.
QUERY
RESPONSE
Field Name
(Hex)
Field Name
(Hex)
Slave Address
01
Slave Address
01
Function
06
Function
06
Address Hi
00
Address Hi
00
Address Lo
03
Address Lo
03
Data Hi
00
Data Hi
00
Data Lo
3C
Data Lo
3C
Error Check (CRC)
--
Error Check (CRC)
--
