Chapter 4 Basic functions and System configuration
4 – 2
4.2
Basic functions of compact remote
4.2.1 Channels and remote I/O area
(1) Channels
The channel is the unit of transmitted and received data between master module (EH-TRMME) and slave
module (EH-TRMLE). One channel consists from 16 bit (1 word) input area and 16 bit (1 word) output
area as shown as Figure 4.1.
(2) Remote I/O area
The master module (EH-TRMME) and the slave module (EH-TRMLE) has remote I/O area consists from
16 channels (0 to F).
Rem ote I/O area
Input
Output
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Channel
No.
16 bits (1 word)
16 bits (1 word)
Input
O utput
Com position of one channel
16 channels
Figure 4.1 Composition of remote I/O area and one channel
4.2.2 Master number and slave station number
(1) Master number (Master No.)
Maximum four compact remote master modules (EH-TRMME) can be mounted on slots those slot number
are 0 to 7 as shown as Figure 4.2 in the case of setting I/O assignment of master module “REMOTE 2”. In
this case remote master number is sequentially allocated from one near CPU from 1 to 4. I/O No. on
remote slave base are determined according to this master number. Please refer to Section 4.3.1 for I/O No.
on remote slave base.
0 1 2 3 4 5
6
7
Slot No.
8
9
A
Master No.2
Master No.3
Master No.4
Master No.1
M ountable slots (0 to 7)
Sequentially
allocated from
one nearer to
CPU module
Figure 4.2 Mountable slots for master module and master number
