Precautions For Use; Startup Time Of Master Module - Hitachi HIDIC EH-150 Applications Manual

Chapter 11 Precautions for Use
This chapter lists some precautions that should be aware of when communicating data via the inputs/outputs
between the EH-150 CPU module and each of the slaves on DeviceNet.

11.1 Startup Time of Master Module

It takes approximately 5 seconds for the EH-150 CPU module to start running from the point when the power
is turned on.
On the other hand, it takes approximately 10 seconds before it becomes possible for the EH-RMD to carry out
I/O communication with the slave devices registered in the scan list.
Therefore, it is necessary to wait with turning the RUN switch of the CPU module on until after the MS and
NS LEDs on the EH-RMD turn on if input/output communication with the slaves is performed immediately
after the RUN start using the user program.
In addition, if a ladder program is used, use the master control in such a way that the user program is not
executed until after 10 seconds have passed.
Also, refer to the active node which is shown in the "activist node" field of the special inner output.
If these bits was ON, it shows that the EH-RMD have started communication with the slave devices
registered in the scan-list.
R7E4
TD0
User program
TD0
MCS0
MCR0
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Chapter 11 Precautions for Use
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