South-Tek Systems N2-BLAST FPS-500 - Startup and Leak Checking

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The Leader in Nitrogen Generation Technology
FPS-500 O&M Manual
Revision 2; 3/2020
Page 19 of 30
7.8. Communication
(1) (Modbus RTU)
Modbus (RTU) is optional feature our generator offers to our customer to monitor the unit
from BMS (Building Management System).
MODBUS communication can be set up to retrieve real time data. The nitrogen generator
MODBUS Communication settings are as follows:
- Protocol: RTU
- Slave ID: 1
- PLC Controller: Slave
- Bud rate: 119200
- Data Bits: 8
- Parity: none
- Stop Bits: 2
See MODBUS addressing table below:
Function
Data Type
Modbus RTU
Address
Units/Status
Read/
Write
Running / Standby
BOOL
00012
0=Standby, 1=Running
R
Common Alarm
BOOL
00004
1=Good, 0=Alarm
R
BlastOff Alarm
BOOL
00015
0=Good, 1=Alarm
R
Bypass Alarm
BOOL
10005
1=Good, 0=Alarm
R
Filter Alarm
BOOL
00029
0=Good, 1=Alarm
R
Filter Reset Confirm
BOOL
00031
0=Good, 1=Alarm
R
Filter Hours
Register
40019
xxxxx.x / hours
R
(2) Analog output (4-20 OUT)
Another useful and optional feature of (FPS) Reliable System units an analog signal
output (4-20 mA) for current readings of different data points as follow:
(i) Ambient temperature “4-20 out dEGr.F”
(ii) Oxygen content (percent) “4-20 out p.CEnt”
(iii) Oxygen content (ppm) “4-20 out trACE”
(iv) Supply Pressure “4-20 out prEss”