WAGO 750-652/040-000, Руководство пользователя

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WAGO-I/O-SYSTEM 750 XTR Process Image 35
750-652/040-000 Serial Interface RS-232/RS-485 XTR
Manual
Version 1.3.0
The structure of the control and status bytes is described in the tables below.
Table 22: Control Byte C0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
RC OL2 OL1 OL0 SC IR RA TR
TR Transmit request
RA Receive acknowledge
IR Initialization request
SC Send continuous (of data from the FIFO)
OL 0 Output length (number of characters to be sent that were stored in the output
data, bit 0)
OL1 Output length (number of characters to be sent that were stored in the output
data, bit 1)
OL2 Output length (number of characters to be sent that were stored in the output
data, bit 2)
RC Reserved for internal communication
Table 23: Status Byte S0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
RC BUF_F IL2 IL1 IL0 IA RR TA
TA Transmit acknowledge
RR Receive request
IA Initialization acknowledge
IL0 Input length (number of characters received that are available in the input data,
bit 0)
IL1 Input length (number of characters received that are available in the input data,
bit 1)
IL2 Input length (number of characters received that are available in the input data,
bit 2)
BUF_F Buffer full (message: input buffer is full)
RC Reserved for internal communication
Table 24: Control Byte C1
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 0 OL5 OL4 OL3
OL3 Output length (number of characters to be sent that were stored in the output
data, bit 3)
OL4 Output length (number of characters to be sent that were stored in the output
data, bit 4)
OL5 Output length (number of characters to be sent that were stored in the output
data, bit 5)
0 This constant must be set to 0.