Sampling Period And Control Output Period - Mitsubishi Electric MELSEC Q Series User Manual

3 SPECIFICATIONS

3.3 Sampling Period and Control Output Period

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(1) Sampling period
(a) The Q64TC performs PID operations in order of CH1, CH2, CH3, CH4, CH1,
CH2 .....
The time from when PID operation is started on the current channel (CHn)
until PID operation is restarted on the current channel (CHn) is called a
sampling period.
(b) The sampling period is 0.5 seconds regardless of the number of channels
used.
Since other processings (such as error check) are also performed on unused
channels, the sampling period will not change if you make unused channel
setting.
CH1 PID
operation
(2) Control output period
(a) The control output period indicates the ON/OFF cycle of transistor output.
Transistor output
The manipulated value (MV) represents the ON time of this control output
period as a percentage. (Refer to Section 3.5.6)
(b) Set the control output period to Control output period setting (buffer memory
address: 2F
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CH2 PID CH3 PID CH4 PID
operation operation operation
0.5 seconds (sampling period)
0.5 seconds (sampling period)
OFF
ON
Control output period
, 4F , 6F , 8F ) in the range 1 to 100s.
H H H H
MELSEC-Q
CH1 PID CH2 PID
operation operation
OFF
ON
Control output period
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