Real-Time Communication" Mode; Table 26: Overview Of Segments And Slots - WAGO I/O-SYSTEM 750 Manual

48 Process Image
•
2. Select operating mode:
•
•
The following table clarifies this assignment:

Table 26: Overview of segments and slots

Segment
No. Addr.
1 ---
2 ---
3
4
5
6
7
8
9
10 ---
No.: Consecutive number of the slot
Addr.: Address of the slot
Offset: Offset of the segment in the respective operating mode
Cut-off: Size of the segment in the respective operating mode
r0 ... r6, a0 ... a5: Cut-off configured for the respective slot
n: Total size of the process image (12, 24 or 48 bytes)
6.2.1

"Real-Time Communication" Mode

In "Real-Time Communication" mode, the local 750-644 I/O module transmits
the process data of each segment of the output process image (PIO) by radio to the
assigned remote 750-644 I/O module. The local 750-644 I/O module maps the
data received from the remote I/O module to the assigned segment of its input
process image (PII).
If the cut-off setting matches on both sides, the data in the respective segment of
the PII is overwritten completely by the data located on the other side in the
associated segment of the PIO each time data is exchanged.
If the cut-off setting does not match between two communicating 750-644 I/O
modules, only the data that corresponds to the smaller cut-off can be transmitted
cyclically. The 750-644 I/O module with the larger cut-off then overwrites the
extra bytes of its respective segment in the PII with the value 0. Similarly, data
written to extra bytes of this segment in the PIO are not transmitted to the other
side, but discarded.
Slot addresses 0x10 ... 0x15 are for "Ad-hoc Communication" mode
in "Real-Time Communication" mode, slots 0x20 ... 0x26 are mapped
to segments 3 ... 9
in "Ad-hoc Communication" mode, slots 0x10 ... 0x15 are mapped to
segments 3 ... 8, segment 9 remains unused
Real-time slot
Offset
--- 0
--- 1
1 0x20 2
2 0x21 2 + r0
3 0x22 2 + r0 + r1
4 0x23 2 + r0 + r2 + r2
5 0x24 2 + r0 + ... + r3
6 0x25 2 + r0 + ... + r4
7 0x26 2 + r0 + ... + r5
--- 2 + r0 + ... + r6 n - (2 + r0 + ... + r6)
750-644 Bluetooth
Cut-off No. Addr.
1 --- ---
1 --- ---
r0 8 0x10
r1 9 0x11
r2 10 0x12
r3 11 0x13 2 + a0 + a1 + a2
r4 12 0x14 2 + a0 + ... + a3
r5 13 0x15 2 + a0 + ... + a4
r6 --- --- 2 + a0 + ... + a5
--- ---
Version 2.0.0, valid from FW/HW Version 03/03
WAGO-I/O-SYSTEM 750
®
RF-Transceiver
Ad-hoc slot
Offset Cut-off
0 1
1 1
2 a0
2 + a0 a1
2 + a0 + a1 a2
a3
a4
a5
n - (2 + a1 + ... + a5)
--- ---
Manual