Omron CPM2A - 11-2005 Manual page 65

Unit Components
! Caution
Baud Rate Setting
Pin 1 Pin 2 DeviceNet baud rate
OFF OFF 125 kbps
ON OFF 250 kbps
OFF ON 500 kbps
ON ON Do not set.
Output Hold Setting
Pin 4 Output treatment for communications errors
OFF Clear outputs when a communications error occurs.
ON Retain outputs when a communications error occurs.
4. LED Indicators
Indi- Color Status
ca-
tor
MS Green ON
Flashing Device in
Red ON
Flashing Minor Fault
--- OFF
NS Green ON
Flashing On-line, Not
Red
ON
Flashing Non–fatal
--- OFF
5. Expansion I/O Unit Connecting Cable
Connects the DeviceNet I/O Link Unit to the Expansion Connector on the
PC's CPU Unit or another Expansion Unit. This cable cannot be removed.
Do not touch the Expansion I/O Unit Connecting Cable while the power is being
supplied in order to prevent any malfunction due to static electricity.
6. Expansion Connector
Connects to another Expansion Unit or Expansion I/O Unit
500 m max.
250 m max.
100 m max.
Definition
Device Normal operating status.
Operational
Reading switch settings.
Standby
Unrecover- Unit hardware error: Watchdog timer error
able Fault
Switch settings incorrect, etc.
No Power Power isn't being supplied, waiting for
initial processing, or Unit is being reset.
On-line, Network is operating normally
Connected. (communications established)
Network is operating normally, but
Connected communications are not yet established.
Fatal Com- A fatal communications error has
munications occurred. Network communications are
Error not possible. Check for a node address
duplication or Bus Off error.
Communications timeout or
communica- communications error for some of the
tions error slaves.
Not Checking for node address duplication on
Powered/ the master, switch settings are incorrect,
Not On-Line or the power supply is OFF.
Section 2-2
Max. transmission path
length (reference value)
Meaning
45