Festo CTEU-PB Electronics Description page 127

A. Technical appendix
A.3.3 Transferring input and output data
Data_Exchange
Output data (Outp_Data)
Octet 1: O-data byte_0
(MPA-L output data byte 1)
Bit 0: output x.0
Bit 1: output x.1
...
Bit 6: output x.6
Bit 7: output x.7
Octet 2: O-data byte_1
(MPA-L output data byte 2)
Bit 0: output y.0
Bit 1: output y.1
...
Bit 6: output y.6
Bit 7: output y.7
Tab. A/7: Cyclical data exchange for example 1 from chap. 2.4.1
Festo P.BE-CTEU-PB-OP+MAINT-EN en 1208NH English
Cyclic data exchange is accomplished with the function
Data_Exchange.
With this function, the output data of the bus node are trans-
mitted as an octet string of length x. The octet string length
depends on the number of identifier bytes.
Note
With the function Data_Exchange, the bus node expects
the output data for the valves and electric outputs.
The input data are sent to the master as a reply telegram.
Overview of the user data (Data_Exchange) for example 1
from chap. 2.4.1 (bus node with MPA-L and CTSL):
*)
Input data (Inp_Data)
Octet 1: I data byte_0
(CTSL input data byte 1)
Bit 0: input t.0
Bit 1: input t.1
...
Bit 6: input t.6
Bit 7: input t.7
Octet 2: I data byte_1
(CTSL input data byte 2)
Bit 0: input t.0
Bit 1: input t.1
...
Bit 6: input t.6
Bit 7: input t.7
A-17