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Chapter 1 Introduction
Thank you very much for choosing Hitachi Programmable Controller (hereinafter referred to as PLC), EHV+ series.
1.1 Unpacking
(1) Installation of a battery
EHV+ series CPU is shipped with a lithium battery installed, but a battery connector is disconnected to prevent
unnecessary current consumption. If you need real time clock function or retentive data memory, connect the battery
cable to a connector mounted on PCB of CPU module. Refer to “Chapter 5 Maintenance” for further information.
(2) Initializing of user program
Since initial status of memory devices in the CPU is undefined, memory error may be displayed on 7-segment LED at
the first power up. In order to initialize memory area, execute “Reset origin” in the first use after connecting a battery.
1.2 Instruction
Manuals
I/O modules and communication modules of EH-150 series are available with EHV+ series CPU as listed in page 2-2.
Besides this application manual, application manuals are available shown in Table 1.1.
Table 1.1 Related manuals to EHV+ series CPU
Product name
Model
Type
Application manual number
High-functional modules
EH-PT4
Resistance temperature detective input
NJI-324*(X)
EH-CU
2 high-speed counter
NJI-321*(X)
EH-CUE
Single high-speed counter
NJI-340*(X)
EH-POS
Single-axis pulse positioning
NJI-315*(X)
Communication modules
EH-SIO
Serial interface module
NJI-443*(X)
EH-RMD
DeviceNet master module
NJI-364*(X)
EH-RMP
Profibus
master
module
NJI-332*(X)
EH-IOCD
DeviceNet slave controller
NJI-364*(X)
EH-IOCP
Profibus
slave
controller
NJI-333*(X)
* The last alphabet of the manual No. stands for version starting from blank, A, B, C...
