User`s manual

5 - 26

5-4 How to transfer to the relay area

This module is a special I/O module. However, it differs from regular special I/O modules in that

automatic I/O registration cannot be used as 256 bytes of special I/O data registers area is occupied.

So, on systems mounted with this module, be sure to perform optional I/O registration.

• For details on how to perform optional I/O registration, refer to the user's manual for the dedicated

tool (JW-14PG, JW-50SP, etc.).

Optional I/O registration is handy when performing actual operation if you transfer data, that needs to

be handled by relays (in 1-bit increments) in the data exchange area, to relay area on JW50H/70H/

100H. The following example explains how to transfer data to relay area using two modules, JW-

14PS(1) and JW-14PS(2). This example is explained using the ladder program that is actually used

and a list of I/O assignments used at this time.

[Example]

As shown below, when JW-14PS and JW-14PS are mounted on the rack panel, the I/O relays

used on JW-14PS are 0002 and 0003, and the I/O relays used on JW-14PS are 0004 and

0004. These relay areas cannot be used as they are fixed for input.

The following describes transfer of various data when the special I/O data area in which data is

actually exchanged is set to 49000 to 49377 on JW-14PS and to 1000 to 1377 on JW-14PS

by optional I/O registration. It is more convenient in terms of data handling to transfer the top address

of JW-14PS to all relay areas by optional I/O registration as in JW-14PS . However, the relay area

of JW50H/70H/100H is restricted to 1000 to 1577. Accordingly, when there are many units, the

method of setting the leading address to data register area as in JW-14PS and transferring only the

section required in handling by the relays by a ladder program is used.

Sample ladder program 1 (on page 5-32) shows a program for transferring part of the register area (in

byte units) starting from top address 49000 to the relay area. The tables on pages 5-30 and 5-31

show the I/O assignments at that time.

Power supply

module

0000 to 0001

None

Relay assignment area

Special I/O data area

JW50H/70H/100H

Control module

Option module

I/O module

JW-14PS

0002 to 0003

49000 to 49377

0004 to 0005

1000 to 1377