TS4000
56
EXCEPTION:
If the baud rate is not in range, an Illegal Data Value (03) is returned.
5.9.15 Com2 Data Format (0x0014)
A read command returns the current data format for Com2. Write command changes the data
format to the requested values. Valid settings are shown in Table 30.
Default format is 8-N-1
.
EXCEPTION:
If the data format is not in range, an Illegal Data Value (03) is returned.
5.9.16 Reset Relays (0x0016)
A write to this register with a data value of 1 will reset any latched alarms provided the current
gas level is below the alarm set point (or above it for O
2
).
5.9.17 Sensor Life (0x0017)
A read returns the current estimate of remaining sensor life in percentage.
5.9.18 Sensor Scale (0x0018)
A read returns the current sensor scale. Sensor scale value is determined automatically by
sensor type, and cannot be written over MODBUS. For a list of available sensor scales and
associated sensor types, refer to Table 32.
5.9.19 Sensor Type (0x0019)
A read returns the current sensor type. A write is allowed only if the current sensor is set to:
•
“0” (no sensor)
•
“4” or “19” (any Cl
2
sensor)
•
“2” or “3” (any CO sensor)
•
“9” or “10” (any NH
3
sensor)
If the sensor type is set to:
•
“0”, only sensor type value of “1” can be written, defining O
2
sensor
•
“2” or “3”, only sensor type values of “2” and “3” can be written, defining CO – 100
ppm and CO – 500 ppm scale sensors, respectively
•
“9” or “10”, only sensor type values of “9” and “10” can be written, defining NH
3
–
50 ppm or NH
3
– 100 ppm scale sensors, respectively
In all other cases, the sensor type is determined automatically when the sensor is plugged in.
Write attempts in such cases will return a data Exception Code 03 (Illegal Data Value).
Table 32: Sensor Types and Scales
Sensor Type
Sensor ID
Full Scale Value
0
No Sensor Detected
None
1
O
2
25% Volume
2
CO – 100
100 ppm
3
CO – 500
500 ppm
4 Cl
2
– 10
10 ppm
5
ClO
2
3 ppm
6 HCl 20
ppm
7
NO
100 ppm
8 NO
2
20
ppm
