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UMAX130511 Version 1.00A Preliminary Documentation
– May be subject to change
31 - 141
2
2370h sub-index 2 (UO2 FB)
3
2370h sub-index 3 (UO1 frequency FB)
4
2370h sub-index 4 (UO2 frequency FB)
Processor Temperature Measured
N/A
5040h (Power Supply FV) sub-index 1
Power Supply Measured
N/A
5040h (Temperature FV) sub-index 2
Table 23
– Control Number Options Depending on Source Selected
1.6.
PID Function Block
OBJECT DICTIONARY
APPLICATION
Local Control
Signal
Local Control
Signal(s)
CANopen BUS
2500h
Extra PV
RPDO
TPDO
2502h
Digits Extra
2460h
PID Out FV
PID
Calculation
2455/56h
Feedback
Src/Nmbr
2453/54h
Target
Src/Nmbr
Target
PV
Feedback
PV
Target
Percentage
Target vs
Feedback
Error
Calculation
2451h
Integral
Gain
7452h
Integral
Time
7456h
Cycle
Time
6459h
Time
Digits
6458h
Time
Unit
2457h
Response
2452h
Derivative
Time
7454h
Derivative
Time
7450h
Proportional
Band
Gain Digits
(Equal 1)
Target
Limits
Feedback
Limits
Feedback
Percentage
2450h
Tolerance
Figure 13
– PID Control Objects
As with the output function block, the PID control function has control inputs associate with it that
can be mapped to the output from any other function block. Objects 2453h
PID Target Source
and
2454h
PID Target Number
define what value the PID loop will attempt to maintain. For example,
in the case of a setpoint (fixed) control application, this input can be mapped to one of object
5010h, a Constant FV. In this case, since there is no pre-defined range associated with a constant
(see Table 17), the scaling limits will be set equal to those of the feedback input. Otherwise, the
target input units do not have to match the feedback units, so long as they are scaled relative to
one another.
Objects 2355h
PID Feedback Source
and 2356h
PID Feedback Number
define the close-loop
input. Both the target and feedback use Table 22 and Table 23 as the available options. Both
inputs are normalized to a percentage based on the associated scaling limits as defined in Table
17.
Object 2450h
PID Tolerance
defines the acceptable difference between the target and feedback,
as a percentage, whereby an absolute difference smaller than this is treated as a 0% error.