Function Of Feedback Pulse - Panasonic FP2-PP2T Technical Manual

13.6.3 Function of Feedback Pulse

The function using the feedback pulse from an encoder can be used by setting the pulse input purpose
to "Feedback pulse" on the positioning unit.
Moving amount automatic check function
It is a function to check whether an operating axis is activating in accordance with the command value.
The difference (deviation) between the current value (absolute) managed within the unit and the
feedback pulse value to be input is compared to the preset threshold. The moving amount automatic
check function activates in all operations. This function activates only when setting the pulse input
purpose to "Feedback pulse", and this is ignored when setting to "Pulse" or "High-speed counter".
The setting for the moving amount automatic check function is specified in the following area.
1st axis
Offset
Bank Name
address
Moving amount
008H automatic check
correction numerator
Moving amount
009H automatic check
correction denominator
02H
Moving amount
00AH automatic check
operation
Moving amount
018H
automatic check value
Moving amount
01AH automatic check
interval
13-8
Descriptions
Set the correction value for the pulse input to be performed when
executing the moving amount automatic check.
The deviation feedback value (pulse input value after correction) is
calculated with the pulse input value by the following calculating
formula, and the moving amount automatic check is executed.
Deviation feedback value = (Correction numerator / Correction
denominator) x Pulse input
Set the operation to be performed when the difference between the
command value and feedback value exceeds the moving amount
check value.
0: Error occurs.
If the difference between the feedback value and the command
moving amount exceeded the moving amount check value
(threshold), an error occurs and the operation stops.
The pulse input value will be cleared after clearing the error.
1: Warning occurs.
If the difference between the feedback value and the command
moving amount exceeded the moving amount check value
(threshold), a warning occurs and the operation continues.
The pulse input value will be cleared after clearing the warning.
2: Off
The moving amount check is not performed.
Set the shreshold to perform the moving amount automatic check
function.
Set the intervale to perform the moving amount automatic check
function. (unit: ms)