Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual Device Function Set-point range Explanation

			3. Instruction Set
Device	Function	Setup Range	Explanation
No.
		Available range	The accumulated integral value is
S3+10,	Accumulated		usually for reference. Users can clear
		of 32-bit floating
11:	integral value		or modify it (in 32-bit floating point)
		point
			according to specific needs.
			The previous PV is usually for
S3 +12:	The previous PV	-32,768~32,767	reference. Users can clear or modify it
			according to specific needs.
S3+13
~	For system use only..
S3+19

5.For S3+1~3, when parameter setting exceeds its range, the upper / lower bound will be selected as the set value.

6.If the direction setting (Forward / Reverse) exceeds its range, it will be set to 0.

7.PID instruction can be used in interruption subroutines, step ladders and CJ instruction.

8.The maximum error of sampling time TS = - (1 scan time + 1ms) ~ + (1 scan time). When the error affects the output, please fix the scan time or execute PID instruction in timer interrupt.

9.PV of PID instruction has to be stable before PID operation executes. If users need to take the value input from AIO modules for PID operation, care should be taken on the A/D conversion time of these modules

10.For 32-bit instruction, S3 occupies 21 registers. In the program example above, the area designated in S3 will be D100 ~ D120. Before the execution of PID instruction, users have to transmit the parameters to the designated register area by MOV instruction. If the designated registers are latched, use MOVP instruction to transmit all parameters only once.

11.Parameter table of 32-bit S3:

Device	Function	Set-point range	Explanation
No.
			Time interval between PID
			calculations and updates of MV. If
			TS= 0, PID instruction will not be
S3 :	Sampling time (TS)	1~2,000	enabled. If TS is less than 1
		(unit: 10ms)	program scan time, PID instruction
			sets S3 as 1 program scan time,
			i.e. the minimum TS has to be
			longer than the program scan time.

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