Process Image - WAGO 750 Series Manual

2.1.3.6

Process Image

Using the I/O module 750-511/000-001, a 6 byte input and output process
image can be transferred to the fieldbus coupler / controller via two logical
channels.
The setting of the frequency value occurs in the two output bytes (D0, D1) and
the counter reading of the pulse counter is given in the two input bytes (D0,
D1). The two input bytes (D2, D3) and output bytes (D2, D3) are not used for
the frequency value setting. The control byte C0 serves for the setting of the
pulse counter. The control byte C and the status bytes (S0, S1) are not used.
Attention
The representation of the process data of some I/O modules or their variations
in the process image depends on the fieldbus coupler/-controller used. Please
take this information as well as the particular design of the respective
control/status bytes from the section "Fieldbus Specific Design of the Process
Data" included in the description concerning the process image of the
corresponding coupler/controller.
S0
D0
D1
S1
D2
D3
The frequency is set at 2 Hz per digit via the output process image (D0, D1).
The impulses are displayed with preset On/Off ratio by 50% on the first output
channel DO 1.
In the input process image (D0, D1) the PLC receives back the number of
displayed impulses.
The counter direction is set by the sign of the output data (signed integer). The
second channel (DO2) indicates the sign.
WAGO-I/O-SYSTEM 750
I/O Modules
750-511/000-001 [2DO 24V DC 0,1A/Frequency/2kHz]
Input data
Status byte 0
Pulse counter (low Byte)
Pulse counter (high Byte)
Status byte 1
X (no evaluation)
X (no evaluation)
Process Image
Output data
C0 Control byte 0
D0 Frequency value (low Byte)
D1 Frequency value (high Byte)
C1 Control byte 1
D2 0 (reserved)
D3 0 (reserved)
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