Chapter 5 Parameter Introductions
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5.8 PID Control (Group P7)
P7.00 PID feed selection
Range: 0～4【1】
0: PID digital input 1: AI1 terminal
2: AI2 terminal 3: Pulse frequency
4: Serial communication
Note:
◆P7.00 is used to define the input method and channel of PID feed. It can be a digital
input (0, 4). It can also be an analog input (1, 2, 3). The digital input is more accurate
and stable. Analog input curve can be defined by parameter group P4.
◆Note: If P7.00 is set to 0, there are 2 kinds of sources for PID digital input: “Analog
PID digital feed” (P7.02) and “speed PID feed” (P7.03). If “Feedback selection”
(P7.01) is set to 9, “speed PID feed” (P7.03) will be treated as PID digital feed.
Besides that, “analog PID digital feed” (P7.02) will be treated as PID digital feed.
◆AI1/AI2 terminal: PID feed by analog input. Dial the voltage and current switches to
select the terminal as a 0~10V or 0~20mA analog input. For details, please refer to the
basic operating wiring connections in Fig.2-30 and Fig.2-31.
◆Serial communication: PID feed will be set by the host PC through RS485 serial
communication. If analog PID is used, the setting must be based on the percentage of
the measuring range. If speed PID is used, the setting value must be based on the
percentage of the largest speed.
P7.01 PID feedback selection
Range: 0～9【1】
0: AI1 terminal 1: AI2 terminal
2: Serial communication 3: Pulse feedback
4: |AI1-AI2| 5: Reserved
6: AI1+AI2 7: MIN (AI1, AI2)
8: MAX (AI1, AI2)
9: PG or single-phase speed
measuring input
Note:
◆P7.01 is used to define the input method of PID feedback. If P7.01 is set to 9, speed
PID is selected as PID feedback. If the feed is analog input, the analog signal should
be set according to full-scale of the maximum speed (The max of signal should be
corresponding to the maximum frequency speed). The other setting of P7.01 means
analog PID feedback selection.
◆AI1/AI2, serial communication: The same description as PID feed selection (P7.00).
◆PG or Single-phase speed measuring input: Uses pulse encoder (PG) as the speed PID
control. At this time, terminal X7 or X8 must be set to speed measuring.
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