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The bits required for this are given in the appendix in section 3.4, „Bit field for I/O driver".
Name
...
Input2
...
FILT1
...
Direction_
Neg
...
A prerequisite for this is that the mailbox has already been activated. This is
explained in Chapter 2.1.2.8, "Mailbox Mode".
Applying the procedure described above, the bits for the standard
configuration control and status bytes can also be modified.
Attention
Any change to the standard configuration will nullify the description given for
the changed items.
Unassigned linkable bits can be linked to the constant bits ZERO or ONE.
2.1.2.10.5.1
Special Bits: ZERO, ONE, MZERO and MONE
The ZERO and ONE bits are fixed. The ZERO bit is always deleted and has a
value of 0, the ONE bit is always set and has a value of 1.
Linkable bits can be set to a fixed value using ZERO and ONE bits.
The MZERO and MONE bits have the same function, but also possess an
additional function when they are the source for linkable bits.
The status of linkable bits is given by the source bit. As a result, linkable bits
can not be changed by commands or access functions. An exception to this
rule are the linkable bits that are linked to MZERO and MONE.
A bit that is linked to MZERO is first deleted after a reset, but can be
manipulated as required using the mailbox command or the Move program. A
bit that is linked to MONE is initially set after a reset and is otherwise treated
the same as a bit linked to MZERO.
WAGO-I/O-SYSTEM 750
I/O Modules
Bit number
Type
Dec.
Hex.
49
0x31
SRC
168
0xA8 FILT
187
0xBB DST/
SRC
750-671 [Steppercontroller]
Default allocation
Target/Sourc
Bit no.
e
KBUS_ST3_1
0x91
Set_Reference
0xBC
ZERO
0x00
KBUS_CTRL
0x53
3_3
Configuration
Description
Input 2
Timer / Filter 1
Move in negative direction.
• 67
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