DeviceNet 5-4
© 2005 HMS Industrial Networks
AB7607 User manual
Run/Idle Mode
The Anybus-X has two modes of operation, Run and Idle. In both modes the Any-
bus-X’s DeviceNet master maintains communication with slave devices in its scan
list.
In Run mode the Anybus-X sends output data to the slaves and receives input
data. Since it is actively sending output data affecting slave device operation, the
Anybus-X rejects attempts to alter its configuration and disrupt communications;
it must first be put in Idle mode.
In Idle mode the Anybus-X still receives input data from the slaves but it does not
send output data. In Idle mode the Anybus-X configuration can be changed.
The Run/Idle mode of the Anybus-X is controlled through the command registers
at the front of the output data from the EtherNet/IP scanner (See “Output Assem-
bly” on page 6-6). The module powers up in Idle mode.
The module automatically reverts to Idle mode when the Ethernet I/O messaging
stops. If the Ethernet protocol is EtherNet/IP, this is handled when the I/O connec-
tion closes. If the protocol is Modbus/TCP, this is handled when no requests are
received within the configured timeout period.
If no EtherNet/IP I/O connection is active, the Run/Idle mode of the Anybus-X is
set through an attribute of the Identity object. To change the Run/Idle mode, use a
DeviceNet messaging tool and send the following message:
Service:
Set_Attribute_Single
Class:
1
Instance:
1
Attribute:
103 (67h)
Request Data: 00 for Idle, 01 for Run
Note:
When the Anybus-X is reset or powered up, it begins operation in Idle
mode.