2.12 Process data control
2.12.2 PED_Steuerung
71
The COMPAX parameters P135, P136, P137 and P138 initiate the object PI_SELECT and thereby the PED channel after the
COMPAX is turned on.
These parameters can be read and written to using the PED_INI object.
PE_SELECT allows the channels to be freely assigned. You will find depictions of the various possibilities of parameters
P135 - P138.
Notes
Note the following when configuring the PED:
•
Note the length (number of bytes) of an object. An object can be represented on the PED's only if the corresponding number
of PED bytes is available, i.e. are not occupied by any other objects.
•
An object can be removed (deleted) again from the PED channel either by using the null object (Index and Sub-index = 0) or
by setting the corresponding COMPAX parameter to "0".
Example for configuring the PED's
Represent the object INPUT_WORD, S3 and S4 on the PEDs.
PED1 (3)
5
PED2 (4) PED3 (5) PED4 (6) PED5 (7) PED6 (8)
INPUT_WORD S3 S4
DB1 (MSB) DB2 (LSB) DB1 (MSB) DB2 (LSB) DB1 (MSB) DB2 (LSB)
Configure PE_SELECT as follows:
Using the object "PE_SELECT", the PAD assignment can be changed during operation:
Sub-index Meaning value
dec hex
1 PED length (not variable) 6 0x06
2 Object index assigned for PED1 (3) 24568 0x5ff8
3 Object sub-index assigned for PED1 (3) 0 0x00
4 Object index assigned for PED2 (4) 0 0x0000
5 Object sub-index assigned for PED2 (4) 0 0x00
6 Object index assigned for PED3 (5) 24570 0x5ffa
7 Object sub-index assigned for PED3 (5) 0 0x00
8 Object index assigned for PED4 (6) 0 0x0000
9 Object sub-index assigned for PED4 (6) 0 0x00
10 Object index assigned for PED5 (7) 24572 0x5ffc
11 Object sub-index assigned for PED5 (7) 0 0x00
12 Object index assigned for PED6 (8) 0 0x0000
13 Object sub-index assigned for PED6 (8) 0 0x00
To ensure that this setting of the PED channel is present upon Power On, the corresponding COMPAX parameters (P135 ...
P138) or PED_INI must be assigned as follows:
Sub-index Meaning value
(Parameter) dec hex
1 (P135) Object index and sub-index assigned for PED1 (3) 6289408 0x5ff800
2 (P136) Object index and sub-index assigned for PED2 (4) 0 0x000000
3 (P137) Object index and sub-index assigned for PED3 (5) 6289920 0x5ffa00
4 (P138) Object index and sub-index assigned for PED5 (7) 6290432 0x5ffc00
5 The PED numbers in brackets are valid for a PD length of 8 bytes (P196 Bit 0...2 = "4").
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