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GTC-200F
Instruction Manual
8.2.1. Setting for communication
8.2. RS485 MODBUS Interface
9.1. Power ON
■ Baud rate : 9600BPS
■ Stop bit : 1 Stop
■ Parity : Even parity
■ Check wire connection of operation power supply, wire connection with detection unit, wire connection between
alarm unit and concentration display unit, etc.
■ Turn ON the power supply switch after checking input power supply.
■ Check lighting of Power LED for alarm unit and concentration display unit.
■ Check display of "SELF" in FND for concentration display unit.
8.2.2. Setting for RS485 MODBUS communication and Register
NO
FUNCTION NAME
ADDRESS
OTHER
1
Concentration value for Channel-1 unit
30001
Address increased by 1
at a time per Channel unit.
2
Concentration value for Channel-2 unit
30002
3
Concentration value for Channel-n unit
30xxx
■ Concentration values for Channel unit (Analog input)
[Table 5. Register of concentration values for channel Unit RS485]
NO
FUNCTION NAME
ADDRESS
OTHER
Channel-1 unit
Alarm1 state data
10001
8Bit each assigned per 1
Channel unit
Alarm2 state data
10002
Alarm3 state data
10003
Breakdown state data
10004
Checkup state data
10005
Reserve data
10006~10008
Channel-2 unit
Alarm1 state data
10009
8Bit each assigned per 1
Channel unit
Alarm2 state data
10010
Alarm3 state data
10011
Breakdown state data
10012
Checkup state data
10013
Reserve data
10014~10016
Channel-n unit
State data
10001+((n-1)*8) ~ 10001+(((n-1)*8)+8)
■ Bit data for Channel unit state ( Reading data for digital input contact)
[Table 6. Register of channel Unit RS485 state]
9.2. Gas Measuring Mode
■ If there is no abnormality in SELF TEST after Power On, the following gas measuring state is automatically entered into.
- When power supply for Channel unit is turned ON, "SELF" in FND for concentration display unit blinks
for 15 Sec, and immediately becomes measuring state when Warming-Up is finished.
- If abnormality occurs in equipment and detection unit at this time, breakdown alarm occurs
- Gas concentration values received from the detector are displayed in FND Digital display as figures.
- The gas concentration is also displayed by 3 Color Bar graphic LED, in green for the concentrations
of less than 1st Alarm , in orange for the concentrations of more than 1st Alarm but less than 2nd
Alarm, and in red for the concentrations of more than 2nd Alarm.
- 3-stage Alarm setting values are constantly displayed by 3 Color bar graphic LED, in green for 1st
Alarm values, in orange for 2nd Alarm values, and in red for 3rd Alarm values.
- When the detector is not connected or has abnormalities, the text of "Undr" is displayed by blinking at
an interval of about 0.5sec.
- Trouble LED lamp is lighted.
- The circular LED at the bottommost among 3 Color bar graphic LED's is lighted in red
- When the current value inputted from the detector is inputted as a current value of more than the set
High Scale value by 10%, the text of "Ouer" is displayed by blinking at an interval of 0.5 sec.
- The circular LED at the topmost among 3 Color bar graphic LED's is lighted in red..
- When the gas concentration value is recognized as being more than the Alarm setting value, Alarm
function is operated as the relevant Alarm function counts the Alarm maintenance time to find it to be
more than the Alarm maintenance time.
- While the Alarm maintenance time is being counted, Alarm LED Lamp blinks at an interval of 0.5sec,
and lighted when it becomes more than the Alarm maintenance time.
- Alarm relay is turned ON when it becomes more than the Alarm maintenance time.
- When Alarm latch type is in "on" mode, Alarm state and gas concentration value are maintained at the
maximum value upon operation of Alarm function, is not cleared even when the gas concentration is
lowered below the Alarm value, in which case, it must be cleared by using "Reset" key.
- When the Alarm latch type is in "off" mode, Alarm function is automatically cleared depending on gas
concentrations
9. How to operate Channel Unit
8. How to operate Common Unit
