8 Application Instructions API 100-149 Remarks: 1. Setting of S 3 : 2. Control Diagram: FTC SV + e Controller MV Fuzzy PV Temperature Sensor 3. Notes and suggestion: It is recommended that the sampling time be set to 2 times more than the sampling time of the temperature sensor for better temperature control. bit2 ~ bit5 of S 3 +1 are for the control speed. If the user does not set up the parameter, FTC will automatically activate “general heating environment”. When the user finds that the control is too slow to reach SV, select “slow heating environment” to enhance the speed to reach SV. On the contrary, when the user finds that the control is DVP-PLC Application Manual 8-63 Device No.
Function Range Explanation Sampling time (T ) S (unit: 100ms) 1 ~ 200 (unit: 100ms) If T is less than a scan time, PID S instruction will be executed for a scan time. If T = 0, PID instruction S will not be enabled. The minimum T S must be greater than a scan time. +1 b0: temperature unit b1: filter function b2 ~ b5: heating environnment b6 ~ b15: reserved b0 =0 means oC b0 =1 means oF When the value exceeds the upper bound, use the upper bound. b1=0 means without fileter function b1=1 means with filter function When without filter function, PV = currently measured value.
When with filter function, PV = (currently measured value + previous PV)/2 b2=1 Slow heating environment b3=1 General heating environment b4=1 Fast heating environment b5=1 High-speed heating environment +2 ~ +6 Parameters for system use only. Do not use them.