Festo Электроцилиндр - Manual (Page 83)

5 Commissioning
Festo – GDCP-CMMO-ST-EA-SY-EN – 1301a – English 83
5.9 Comparators
The following drive conditions can be observed in the binary profile:
– Position comparator active: The drive is located between two defined positions, i.e. in a position
zone. This status can also be reported in the valve profile.
– Speed comparator active: The speed is within a defined range.
– Force comparator active: The force calculated via the current is within a defined range.
– Time comparator active: The time since the start of the command record is within a defined range.
You can allocate these comparators in FCT to a digital output: “Digital I/O” page.
5.9.1 Position comparators
The message “Position comparator active” is set when the following two conditions are fulfilled:
– The actual position is within the parameterised position limits ( › minimum and š maximum).
– The first condition has at least been fulfilled over the specified time period (damping time).
In all other cases the message is inactive.
When the drive leaves the position zone again, the message is reset immediately.
The position comparators can be used in all operating modes (positioning mode, speed mode, force
mode).
Overview of parameters for position comparators
FCT
Lower position limit (minimum)
1)
x
Upper position limit (maximum)
1)
x
Damping time [ms]: Minimum dwell time within the position zone before the position compar-
ator is active.
x
Feedback
You can allocate this signal to digital output 6 or 7 in FCT on the “Digital I/O” panel.
1) The specified limits are always absolute positions (related to the project zero point).
If the minimum value is greater than the maximum value, the condition for the position comparator is never fulfilled.
Example of a position zone in a negative range: “–50 … –40 mm”.
“–50 mm” must be entered as the minimum value and “–40 mm” as the maximum value.
Tab. 5.12 Parameters for position comparators
The position limits are always specified in absolute values, even for relative position
records.