Toshiba T2N - Manual (Page 121)

2.INTERNAL OPERATIONS
108 PROSEC T2N
The status of the external input signals from the input module is read onto the
I/O register/device (XW/X), the output register/device (YW/Y) status is output to
the output module. This process takes place before user program execution
and is done in batches, hence name batch I/O processing. Batch I/O
processing proceeds as follows.
Batch inputting ··· signals from the input module with no i specification on
I/O allocation and input registers/devices (XW/X) which
are not forced
Batch outputting ··· output register/device (YW/Y) corresponding to output
modules with no i specification on I/O allocation
Also, the data transmission module (TOSLINE-S20LP, TOSLINE-F10, TOSLINE-
30) and the link register relay (W/Z and LW/L) within the CPU module run the
data exchange.
2.4.2
Batch I/O processing
I/O register/device
L0F
L1F
L2F
L3F
···
···
···
··· L01
L11
L21
L31
L00
L10
L20
L30
XW000
XW001
YW002
YW003
link register/relay
W0000
W0001
W0002
W0003
link relay
input module
output module
link register allocated
to TOSLINE-S20LP/30
link relay allocated
to TOSLINE-F10
TOSLINE-S20LP/30
TOSLINE-F10
LW000
LW001
LW002
LW003