750-404/000-003 [Frequency Counter 0.1 Hz-100 kHz] • 41
Example
WAGO-I/O-SYSTEM 750
I/O Modules
Change the Watchdog Time:
The Watchdog time is change to 5000 ms (hexadecimal value 0x1388).
17.Write the new Watchdog time value into the output bytes.
The data bytes D0 to D3 of the output data then read as follows:
Data bytes
Output data
D3
D2
D1
D0
Value
0x00 0x00 0x13 0x88
18.With bit 4 (T
VD
REQ) in the Control byte the changes are adopted.
Control byte
Output bit
B7
B6
B5
B4
B3
B2
B1
B0
Value
0 X X 1 X X X X
19.After feedback of the counter module with bit 4 (T
VD
ACK) in the status
byte the counter works with the new Watchdog time.
Status byte
Input sbit
B7
B6
B5
B4
B3
B2
B1
B0
Value
X X X 1 X X X X
20.Reset bit 4 in the control byte.
Control byte
Outout bit
B7
B6
B5
B4
B3
B2
B1
B0
Value
0 X X 0 X X X X
21.The resetting is acknowledged with bit 4 in the status byte.
Status byte
Input sbit
B7
B6
B5
B4
B3
B2
B1
B0
Value
X X X 0 X X X X
X is used if a value is not relevant.