Chapter 1. Foreword
1.2
Precautions during use
1. Optical type link modules can only be installed in slots #0 to #2 on the basic base.
2. A maximum of two modules that have been I/O assigned as "CPU Link" can be installed in each CPU.
3. Do not plug in and unplug the optical cable until the power supply to the base on which the optical type link
module has been installed has been switched off.
4. Do not attach or detach the optical type link module until the power supply to the base on which the module
has been installed has been switched off.
5. Do not plug in or unplug the transmission cable or other cables during communications.
1.3
Usable CPU modules
The EH-OLNK (optical type CPU link module) can be used in combination with the following types of CPU
module. Note that the link data will become unstable and access to other stations with peripheral devices will
not be possible if the EH-OLNK is mistakenly used in combination with CPU modules other than those listed
below.
Table 1.3 CPUs that can be used with the EH-OLNK
CPU Type
Version
Date of manufacture
EH-CPU104 / 208
EH-CPU308 / 316
Not supported
---
EH-CPU104A / 208A
EH-CPU308A
Ver. A2.03 or later *
October, 2001 or later
EH-CPU316A
Ver. B2.03 or later *
October, 2001 or later
EH-CPU448
Ver. C3.22 or later
Ver. C4.04 or later
October, 2000 or later
*The 1st Version of this CPU is A203 / B203. Therefore EH-OLNK is supported by all the versions of this CPU.
P R O G R A M M A B L E
C O N T R O L L E R
M O D E L
S P E C .
M F G . N O
E H - C P U
* * *
P R O G R A M
* * *
K S T E P S
H A R DW A R E R E V.
* *
R O M V E R .
* *
** * ** *
M A D E I N J A P A N
C P U
Hitachi,Ltd.
Tokyo Japan
Side view of the CPU module
C P U T Y P E
Ve r s i o n
Figure 1.1 CPU ROM version display
1-2
