Functions
7100.006424_Bus description_PSD4xx_CA_H_ENG 35 08.04.2020
4.8 Set the spindle pitch
SDO #2010 (numerator factor) and #2011 (denominator factor) can be used to set any
spindle resolutions using actual value assessment factors.
ππ. ππ πππππππππ‘π πππ πππ‘ππ‘πππ = 400 β
π·ππππππππ‘ππ ππππ‘ππ
ππ’πππππ‘ππ ππππ‘ππ
Both factors are set to a value of 400 by default, resulting in a resolution of 0.01 mm at a
spindle pitch of 4 mm.
The denominator factor serves as a simple means of setting the spindle pitch and resolution.
The numerator factor is primarily used for setting βunlevelβ resolutions.
Examples:
Note: Numerator and denominator factors may take on values between 1 and
10,000.
4.9 Abort the run when the master fails
If the connection to the master is interrupted during a positioning run, the master cannot
abort a run that is already underway. There are two ways of generating an automatic run
abort in a case like this:
1. Node guarding or
2. heartbeat consumer
Node guarding
In the case of the former (node guarding), the guard-time and lifetime factors must be
programmed into the drive. The master must then cyclically transmit the drive heartbeat as a
remote object.
Heartbeat consumer
In the latter method, the Node ID and the cycle time of the master heartbeat must be
programmed in the drive as the consumer heartbeat. The master must then send this
heartbeat in a cycle.
Note: The second option places less load on the bus, because all drives only need
to transmit an unconfirmed master heartbeat (just one message for all consumers).
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