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MITSUBISHI ELECTRIC AUTOMATION
3.
GETTING STARTED
3.1
Introduction
This section is intended to facilitate the configuration of the FR-A5ND DeviceNet
Option with minimum effort. It is assumed that the default values specified in
this section are acceptable to the user. If the user wishes to change these
values, the data necessary to do so is provided later in the manual.
This section assumes that network cabling is complete and DeviceNet com-
munication has been established. The status LED on the FR-A5ND option
should be either blinking green or steady green as described in Table 2-2.
3.1.1
General Description:
The FR-A5ND DeviceNet Option Unit is considered a slave device in the
DeviceNet communication standard. This means that the FR-A5ND cannot
initiate messages on the network. A master device must establish a connec-
tion to the Option Unit and then send commands, requests for information,etc.
The FR-A5ND Option Unit supports Group 3 Messaging as defined in the
DeviceNet standard. This feature of the FR-A5ND Option Unit means that it
is possible for one master to control the VFD while another reads data from
the same VFD. This also means that the DeviceNet master must support the
UCMM protocol for proper operation.
3.1.1.1. It is strongly recommended that the user configures the DeviceNet
network using a software tool designed specifically for that purpose. The use
of such a tool greatly simplifies the configuration, reduces confusion, and
enhances accuracy. Additionally, the configuration tool will facilitate the elimi-
nation of conflicts between network devices and ensure consistency through-
out the network.
One such tool is DeviceNetManager as supplied by Rockwell Automation.
Tools are available from many other suppliers but the descriptions contained
in the Getting Started section are based upon the use of DeviceNetManager.
3.1.1.2. When adding the FR-A5ND DeviceNet Option Unit to an A500(L)
Series VFD that has previously been configured for a specific application, it
may be necessary to complete a Parameter All Clear (PrClr) instruc-
tion in the VFD in order to remove unintentional conflicts and to allow the
VFD to recognize the presence of the option card.
If this becomes necessary, you will need to record the existing configuration
before issuing the PrClr command as this command will restore factory de-
fault values to all VFD parameters. Once the command is completed and the
