halstrup-walcher PS*3**EIP series, Инструкция по эксплуатации

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Instruction Manual PSx3xxPN
23
Bit 2 : transfer target value
The target value in the process data is being accepted as a new valid target
value, if this bit is set. A positioning run which starts simultanously or later
uses this target value as new target position. If together with taking over the
target value the positioning run shall start immediately, bit 4 (“release”) has to
be set additionally.
If bit 2 is not set, the target value will not be taken over, instead there might be
a positioning run to the target value which has been sent at last and which has
been marked as valid.
Bit 3 : reserved, must be programmed to 0
Bit 4 : Release
Run commands will only be executed if this bit is set.
This bit must be set for positioning runs and manual runs.
If this bit is cleared during a run, the run will be aborted and status bit 5 will be
set (“positioning run aborted”).
Bits 5-15 : reserved, must be programmed to 0
d) PKW parameter interface
Via th
e PKW parameter interface it’s possible to write and read parameter values by
using the cyclic process data connection, besides, also other values might be
retrieved from the drive.
With the help of the PKW parameter interface the IO controller sets and transmits a
new command. It repeats this command cyclically until the drive has processed the
command and has sent back an answer. The drive provides this answer until the IO
controller formulates a new command. A parameter value that’s being sent back by
the the drive as an answer to a read request, refers to the moment at which the IO
controller has been issued the command. I.e. in case of a parameter value that
should be monitored for a longer time, the IO controller has to send another
command after taken over the actual parameter value. This takes place by setting the
request identifier 0 (“no request”) and subsequent waiting, until the drive confirms this
request with the response identifier 0 (“no response”). Afterwards the same
parameter value might be requested again.
One drive can only process one request at a time.
Structure of the PKW parameter interface:
PKW
PKE IND PWE
0 1 2 3 4 5 6 7
PKE = Parameter identifier
IND = Index
PWE = Parameter value