Temperature Measurement of FBs-PLC and PID Control
FBs-PLC provides two kinds of temperature modules to meet the great temperature measurement applications.
One kind of these modules are directly interfacing with the thermocouple, and the others are interfacing with the RTD
sensor. The modules FBs-TC2/FBs-TC6/FBs-TC16 support 2/6/16 temperature channels correspondingly to connect
the J,K,T,E,N,B,R,S type of thermocouple. The modules FBs-RTD6/FBs-RTD16 support 6/16 temperature channels
correspondingly to connect the PT-100,PT-1000 type of RTD sensor. The total temperature inputs can be expanded up
to 32 channels at the most.
By the time domain multiplexing design method, each temperature module occupies 1 point of register input and 8
points of digital output for I/O addressing. The update rate for temperature reading value can be set as normal (Update
time is 4 second, the resolution is 0.1°) or fast (Update time is 2 second, the resolution is 1°).
The Winproladder provides the very user friendly table editing operation interface to configure the temperature
measurement, for example, selecting the temperature module, type of sensor, and assign the registers to store the
reading values… As to the temperature control, it has the convenient instruction FUN86(TPCTL) to perform the PID
operation to control the heating or cooling of the temperature process.
21.1 Specifications of temperature measuring modules of FBs-PLC
21.1.1 Thermocouple input of FBs-PLC
Specifications Module
Items FBs-TC2 FBs-TC6 FBs-TC16
Number of input points 2 Points 6 Points 16 Points
Thermocouple type and
temperature
measurement range
J(−200～900°C) E(−190～ 1000°C)
K(−190～1300°C) T(−190～ 380°C)
R(0～1800°C) B(350～ 1800°C)
S(0～1700°C) N(−200～ 1000°C)
I/O Points Occupied 1 IR(Input Register)、8 DO(Discrete Output)
Software Filter Moving Average
Average Samples NO、2、4、8 Configurable
Compensation Built-in cold junction compensation
Resolution 0.1°C
Conversion Time 1 or 2 Sec. 2 or 4 Sec. 3 or 6 Sec.
Overall Precision ±(1%+1°C)
Isolation Transformer(Power) and photo-coupler(Signal) isolation (per-channel isolation)
Internal Power
Consumption
5V，32mA 5V，35mA
Power Input 24VDC-15%/+20%、2VA max
Indicator(s) 5V PWR LED
Operating Temperature 0～60 °C
Storage Temperature -20～80°C
Dimensions 40(W)x90(H)x80(D) mm 90 x90 x80mm
21-2
21.1.2 RTD input of FBs-PLC
Specifications Module
Items FBs-RTD6 FBs-RTD16
Number of input points 6 Points 16 Points
RTD type and
temperature
measurement range
3-wire RTD sensor JIS(α=0.00392) or DIN(α=0.00385)
Pt-100(−200～850°C)
Pt-1000(−200～600°C)
I/O Points Occupied 1 IR(Input Register)、8 DO(Discrete Output)
Software Filter Moving Average
Average Samples NO、2、4、8 Configurable
Resolution 0.1°C
Conversion Time 1 or 2 Sec. 2 or 4 Sec.
Overall Precision ±1%
Isolation Transformer(Power) and photo-coupler(Signal) isolation (per-channel isolation)
Internal Power
Consumption
5V，35mA 5V，35mA
Power Input 24VDC-15%/+20%、2VA max
Indicator(s) 5V PWR LED
Operating Temperature 0～60 °C
Storage Temperature -20～80°C
Dimensions 40(W)x90(H)x80(D) mm 90(W) x90(H) x80(D)mm
21.2 The Procedure of Using FBs Temperature Module
21.2.1 Temperature measurement Procedure
Start
Connect Modules to the expansion interface on PLC in
series and connect an external 24VDC source and
temperature measure input wires.
- - - - - - - Please refer to section 21.6 for setting and wiring.
Executing the WinProladder and configure the
configuration table address、Temperature register
address and working register in “Temp. configuration”
windows then you can read temperature value from
register directly.
