Toshiba VF-MB1/S15 instruction manual Setpoint Actual value, 15s 20s 25s 30s, Tmax, ZSW Bit

E6581738

3.3.1.Tolerance Range (ZSW Bit 8)

If the setpoint is changed:

1.ZSW Bit 8 is set 0

2.Calculate the tolerance.

3.Start the timer which will time-out based on parameter Tmax.

PDP003Z checks that the timer (Tmax) has not timed-out and if the actual value is within the tolerance. If both conditions are fulfilled ZSW Bit 8 is set 1 and the timer is stopped.

The figure shows ZSW 8 when Tolerance (c157) is 50% and Tmax (c151) is 3s.

Tolerance
= 0x4000 * 50%
HIW	setpoint	actual value
				HIW = 0x4000
				HIW = 0x3000
				HIW = 0x2000
				HIW = 0x1000
15s	20s	25s	30s	HIW = 0x0000
				Time
Tmax	Tmax	Tmax
= 3s

ZSW Bit 8

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