Normal Operation; 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-RMP will perform an internal hardware check.
The STATUS LED will flash Green -> Red -> Green -> Red and then start flashing green with 1Hz until the
initialization sequence is finished, then the STATUS LED should be constantly lit green.
If the STATUS LED continues to flash with 1Hz and nothing happens, the reason might be that the slot is not
configured for a link module in the EH-150 CPU.

5.2 Data exchange

When the initialization sequence is finished the data exchange with the slave starts automatically.
When the CPU is in RUN mode both the input data and the output data will be copied.
When the CPU is in STOP mode, the input data are copied in the same way as during RUN mode, but the output
data behaves according to the setting of the configuration switch.

5.3 Data format

The data format which the EH-RMP outputs at the Profibus-DP is below.
15
WL**
WL** +n
15
WL**
As for the output data on slave , high byte and low byte for word data ( or high word and low
word for long word data ) are swapped, it is dependent on slave type.
The factor is Word / Byte oriented, Motorola / Intel format.
In this case , make the user program after confirming the output format of the data on the slave.

Normal Operation

8
Valid data Can't use
Valid data Can't use
Fig. 5.1 1 Byte data format for byte oriented slave module
8
High Byte Low Byte
Fig. 5.2 Word data format
0
7
0
7
CAUTION
5-1
Chapter 5 Normal Operation
Profibus-DP
0
Byte 1
Octet 1
Byte 2
Octet 2
Profibus-DP
0
High Byte
Octet 1
Octet 2
Low Byte