Published: August 16, 2007
SNAP-SCM-485-422 not recognized after 'Restart I/O unit from powerup' from PAC Manager
Problem was discovered in version: R1.1o
Resolution is included beginning in version: B2.0a
After issuing the command Tools→Inspect→Status Write→Restart I/O unit from powerup from PAC Manager, a SNAP-PAC brain does not recognize a SNAP-SCM-485-422 module configured for 4-wire mode.
To duplicate the problem:
- Use PAC Manager to configure the Mode of Operation for a SNAP-SCM-485-422 to 4-wire mode. Access this area from Tools→Inspect→Communications→Serial Modules. Notice the Module Type shows 0xF1.
- Issue the Tools→Inspect→Status Write→Store configuration to flash command.
- Issue the Tools→Inspect→Status Write→Restart I/O unit from powerup command.
- Check the Module Type. It now shows 0xF3. Notice the 4-wire configuration field is not shown.
Turn the power supply to the rack off and then back on. The Module Type shows 0xF1 again, and the Mode of Operation field correctly shows 4-wire.
Opto 22 has resolved this issue and will include the fix in an upcoming release.
Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
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