Start Up - Hitachi HIDIC EH-150 Applications Manual

3.2 Start up

To operation this module normally, the making a setup which is shown in the following figure is necessary.
(1) Set the DIP switch. Refer to chapter 3.2.1 .
(2) Set the termination switch. Refer to chapter 3.2.2 .
(3) Set the node address. Refer to chapter 3.2.3 .
3.2.1 Mode setting
The EH-IOCP can be configured to run in different modes depending on the users requirements. The configuration is
accomplished by the switch S4 placed on the right side of the EH-IOCP.
Note : Don't operate this switch while EH-IOCP is working.
(1) Clear mode
When the fieldbus is off-line and on run-time errors, the EH-IOCP clears the output data.
Switch Position
1 Don't care
2 Don't care
3 Don't care
4 OFF (default)
(2) Freeze mode
When the fieldbus is off-line and on run-time errors, the EH-IOCP freezes the output data.
Switch Position
1 Don't care
2 Don't care
3 Don't care
4 On
3.2.2 Bus termination
The start node and the end node in a Profibus-DP network has to be terminated to avoid reflections on the bus line. The
EH-RMP is equipped with a termination switch to accomplish this in an easy way.
If the module is used as the first or last module in a network the termination switch has to be in ON position.
Otherwise the switch has to be in OFF position.
Termination switch
ON
OFF
Bus termination
ENABLED
If the module is the last or first module, the bus termination has to
be set on, or an external termination connector has to be used.
DISABLED
3-2
Chapter 3 CONFIGURATIONS
OFF
4 3 2 1
OFF
4 3 2 1