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Instruction Manual PSx3xxPN-STO
26
2.9.3 Structure of process data
1) Output module (from the perspective of the IO controller)
Assignment (cannot be modified):
Byte Description corresponding
parameter number
0-1 PKE
2-3 IND
4-7 PWE
8-9 control word 32
10-13 target position 33
2) Input module (from the perspective of the IO controller)
Assignment (cannot be modified):
Byte Description corresponding
parameter number
0-1 PKE
2-3 IND
4-7 PWE
8-9 status word 1
10-11 actual speed 2
12-15 actual position 3
In the GSD file for the PSx3xxPN the two parameters "control word"
and "status word" are oriented bit-wise (e.g. the flag "UseAsBits" is set
respectively). This allows engineering tools to list the individual bits of
these parameters separately. Due to this feature, the byte order of
these parameters is inverted compared to the other parameters. If
these parameters are being read or written as a whole, this
circumstance has to be noted.
2.9.4 Detailed description of the status bits
Bit 0 : target position reached
This bit is set:
- when a transferred target position has been reached successfully (not at the
end of a manual run, elsewise the target position is the same as the
applicable limit switch)
- after manual displacement while at standstill, if readjustment is activated and
the absolute value of the difference of actual and target value is smaller or
equal to the positioning window again
If bit 0 should be set simultaneously with bit 10 (Block), bit 0 has priority!
This bit is reset:
- after transferring a target position if the difference from the actual value is
larger than the positioning window (Par. 44)
- by a manual run
- if an invalid target value has been transferred
- if rotated manually when on standstill