Operation Command - Omron K7DD User Manual

7-5

Operation Command

The following four types of Operation Commands are available.

Operation Command

Software Reset Command
Parameter Initialization Command
Operation Stop State Transition
Command
Alarm Latch Cancel Command
The Operation Commands are specified by a command code in the command frame.
7-6 Modbus RTU Communications Format (P.7-9) describes the command frame/response frame
configuration.
Software Reset Command
This command executes the power ON reset process, as with a reset process that runs when the
power turns ON.
The power ON reset process puts the K7DD in the same initial state as after the power is turned ON.
The Software Reset Command can be accepted on any levels.
The Software Reset Command can be used in the following cases.
(1) To clear the latched alarm output.
(2) To forcibly return to the Operation Level from a level other than the Operation Level (such as the
Initial Setting Level) by remote operation.
(For example, if you leave the work site while the Unit is still on the Initial Setting Level selected
with key operations, measurement will not start as it is not on the Operation Level.)
(3) To enable a new setting value after changing a setting parameter with the Write Variable Area
Command.
As for (3), the power ON reset process is required to enable a newly set value.
Refer also to
Parameter Initialization Command
This command initializes the setting values of all the setting parameters except those on the
Communications Setting Level.
The command can be accepted on the Initial Setting Level or Communications Setting Level where
operations are stopped.
To enable the setting values that have been reset to their defaults, execute the power ON reset process
by cycling the power supply, sending the Software Reset Command, or operating the keys.
The setting values can be initialized only by this operation command for communications.
To reset the setting values to their defaults by operating the K7DD, refer to the default values on the
table in A-2 Parameters List (P.A-9).
Power Line Data Generator User's Manual (N233)
Performs a forced power ON reset.
Resets all setting parameters to the factory default settings.
Moves you to the operation stopped state.
Turns OFF the latched alarm status.
7-4 Changing Setting Parameters (Write Variable Area) (P.7-6).
7 Communications
Description
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