Chapter 5 Normal Operation 5-1 To; Start Up Sequence; Data Exchange; Data Format - Hitachi HIDIC EH-150 Applications Manual

Chapter 5
5.1 Start-up Sequence
When the power is turned on the EH-IOCP will perform an internal hardware check.
As a LED test, the STATUS led will flash Green -> Red -> Green -> Red.
When the initialization sequence is finished the STATUS LED will be constantly lit green, indicating that it is
ready to exchange data.

5.2 Data exchange

When the fieldbus initialization sequence is finished and contact has been established with the master, the
data exchange starts automatically.
The IN data is transferred within a fixed period of 5ms. The OUT data is transferred whenever new data from
the master is present.

5.3 Data format

The EH-IOCP is word oriented module. The data format is below.
15
Fig. 5.1 The data format on EH-IOCP
To control the I/O modules right, transfer the user data by the format below from the Profibus-DP Master.
Fig. 5.2 The user data format on Profibus-DP
Normal Operation
8
High Byte Low Byte
7 0
High Byte
Octet 1
Low Byte
Octet 2
0
5-1
Chapter 5 Normal Operation