Rockwell Automation Allen-Bradley LiquiFlo 2.0, Руководство пользователя

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Rockwell Automation Publication D2-3518-4 - January 2020 99
Parameter Descriptions Chapter 9
Sets the lower limit of the PI output. This value must be less than the value set in
PI Upper Limit (132).
Sets the upper limit of the PI output. This value must be greater than the value set
in PI Lower Limit (131).
Sets the value used to load into the PI Integrator when PI is not enabled.
The present state of the process PI regulator.
Figure 42 - PI Status (134)
Bit 0 – PI Enabled
• Indicates whether or not the PI loop is enabled.
Bit 1 – PI Hold
• Is set to 1 to indicate when a digital input is configured for PI Hold and is
turned on, or the PI Hold bit is set in PI Control (125).
Bit 2 – PI Reset
• Is set to 1 to indicate when the PI Integrator is being reset to zero.
Bit 3 – PI InLimit
132
PI Upper Limit
Range: -/+Maximum Frequency [0.1 Hz]
Default: +Maximum Freq
Access: 1 Path: Speed Command > Process PI
See also: 124...138
133 PI Preload
Range: -/+Maximum Frequency [0.1 Hz]
Default: 0.0 Hz
Access: 1 Path: Speed Command > Process PI
See also: 124...138
134 PI Status
Range: See Figure 42
Default: Read Only
Access: 1 Path: Speed Command > Process PI
See also: 124...138
0 0 0 0 x x x x x x x x x x x x
0 0 1 1 2 3 4 5 6 7 8 9 11 12 13 14 15
1 =Condition True
0=Condition False
x =Reserved
Bit #
PI Enabled PI Hold PI Reset PI InLimit
Nibble 1 Nibble 2 Nibble 3 Nibble 4