Rockwell Automation DeviceNet Communications Module - Manual (Page 34)

4-8 DeviceNet Communications Module
4.6 Setting the I/O Configuration
The I/O configuration determines the number of drives that will be
represented on the network as one node by the module. If the Mode
Jumper is set to the Single-Mode position, only one drive is
represented by the module, and DSI I/O Cfg (15) has no effect. If
the Mode Jumper is set to the Multi-Drive position, up to five drives
can be represented as one node by the module.
Step 1. Set the value in DSI I/O Cfg (15).
Drive 0 is the MD65 drive with the MDCOMM-DNET
module installed. Drives 1 through 4 are MD65 drives that
multi-drop to the RS485 port on Drive 0. Refer to chapter
8, Using Multi-Drive Mode for more information.
Step 2. If a drive is enabled, configure the parameters in the drive
to accept the Logic Command and Reference from the
module. For example, set Start Source (P036) and Speed
Reference (P038) in an MD65 drive to Comm Port.
Step 3. Reset the module. Refer to section 4.9 for this procedure.
4.7 Selecting COS, Cyclic, or Polled I/O
The data exchange (sometimes called allocation) is the method that
the module uses to exchange data on the DeviceNet network. The
module can be configured to use one of the following data
exchanges:
• COS (change of state)
• Polled and COS
• Cyclic
• Polled and cyclic
• Polled
If “polled and COS” or “polled and cyclic” is used, the module
receives the I/O from the polled messages. It transmits its Logic
Status and Feedback in COS or cyclic messages. Other data is
transmitted in polled messages.
Figure 4.8 – I/O Configuration Screen on an LCD OIM
Value Description
Mode Jumper Position
Single Multi-Drive
0 Drive 0 (Default)
1 Drives 0-1
2 Drives 0-2
3 Drives 0-3
4 Drives 0-4
DSI I/O Cfg
Parameter: # 015
Drive 0 0
VALUE LIMITS SEL