86 • vacon description of parameters
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7
7.2 Application specific variables in the monitor menu and fieldbus interface
1700 Monitoring value: ActualRatio * 2^16
(V1.17)
Actual value of ratio after the ramp. 65536 counts = unity ratio.
1701 Monitoring value: Position error
(V1.18)
Actual value of position error = Master position x actual ratio – Follower position.
1 count = 1 engineering distance unit. Positive error means follower lagging compared to
the master when running in the forward direction.
1702 Fieldbus high resolution position error
Actual value of position error = Master position x actual ratio – Follower position.
65536 counts = 1 engineering space unit.
1703 Fieldbus synchronization status register
The map of the status register is shown in Table 41.
1803 Accum SpaceError
Shows the accumulated Position Error in user units between Master and Follower. This
value will grow if Follower drive trips and the master continue to run before it is stopped.
(Normally Fault output from follower should stop the master drive when there is a fault
in follower)
NOTE: This value is resetted when synchronization is enabled again (B0).
Value is useful for correction of position error between master and follower when
filedbus control is used. In that case this value can be transferred to parameter P2.9.3.1
(ID 1805) to correct the error.
In that case, be sure to store the Accum Space Error value in controller before enabling
Synchronization again.
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