Operation With Continuous Send; Transmission Of A Block Of One To 512 Bytes; Table 33: Receive Data; Table 34: Receive 2 Characters - WAGO 750 Series Manual

WAGO-I/O-SYSTEM 750
750-652 Serial Interface RS-232 / RS-485

Table 33: Receive data

Status byte 0
0-xxx X (00x)
'0XX1. 001X'
After the 2 characters have been processed, RA is inverted.

Table 34: Receive 2 characters

Control byte 0
'0XXX XX1X
The receipt of additional characters is indicated by different values for RA and
RR.

Table 35: Receipt of additional characters

Status byte 0
'0XXX. X01X' '0XXX. 1XXX'
'0XX1. 000X'
After the characters have been processed, RA is inverted.

Table 36: Output process image after data transfer

Control byte 0
'0XXX XX0X
8.3.5

Operation with Continuous Send

8.3.5.1

Transmission of a block of one to 512 bytes

The output buffer is filled up with data up to number n (n ≤ 512 bytes)
To transmit the buffer content, the bit 3 (SC) of the control byte 0 is set by the
controller. The I/O module begins with the data transmission and the bit 3
(BUF_E) of the status byte 1 is reset.
If all data is transmitted, the bit 3 (BUF_E) of the status byte 1 is set.
The controller takes bit 3 (SC) of the control byte 0 back from the controller. The
end of the transmission from the I/O module is detected this way.
Manual
1.2.0
Status byte 1 Input byte 0
'0XXX. 1XXX' XX
'0XXX. 1XXX' "W"
Control byte 1
'0XXX.XXXX'
Status byte 1 Input byte 0
XX
'0XXX. 1XXX' "G"
Control byte 1
'0XXX.XXXX'
Commissioning
Input byte 1
XX There are no receive data
available.
"A" The data is available in the
input bytes.
Output byte 0
XX
Input byte 1
XX There are no receive data
available.
"O" The data is available in the
input bytes.
Output byte 0
XX
55
Output byte 1
XX
Output byte 1
XX