Johnson Controls 300 Series Manual page 58

58 Network Control Module 300 Series Technical Bulletin
3. If using a Thomas-Conrad ARCNET board, ensure that the
operating mode switch setting is set to compatible.
4. Ensure that the physical configuration of the system is within
guidelines. These include cable lengths, type, integrity, end-of-line
terminators, N1 and N2 connections, the number of devices on
each trunk, and the proper selection of the ARCNET bus/star
configuration. Related Commissioning Problems, at the end of this
section, includes notes on cabling and EOL terminations. In
addition, refer to: N1 ARCNET Local Area Network Technical
Bulletin (LIT-636017), and N2 Communications Bus Technical
Bulletin (LIT-636018).
• Configurations marginally outside specification have
occasional failed bootups, such as one in five. A different
NCM may increase or decrease the failure rate of a marginal
configuration.
• If, in the NCM Diagnostics N1 Statistics window, the
RECONS value remains steady, and there are no duplicate
addresses, the N1 wiring is probably good.
5. Inspect the error logs (both in the NCM and the OWS) for the
source of the problem.
• For the NCM, use WNCSETUP - LOGFILE command
Note: If the NCM continuously reboots - and erases the Error
Log-run WNCSETUP and answer No to the Reboot on
Error prompt. Make sure to reset the prompt to Yes when the
problem is resolved.
• For the OWS, read the ERRORLOG.TXT file - NC Task/Error
Log; Troubleshooting Guide Technical Bulletin (LIT-636328).
6. Attempt a direct connect communication to the NCM.
If You Can Communicate with the NCM but Cannot
Download Properly
You can download from an OWS to an NCM though a serial card or
internal modem in an ISA slot if you are using an NCM350 or
NCM361 with Metasys Release 8.0 or later software. If you are using
an NCM300 or NCM311, you must download before the OWS can
communicate to the ISA slot. Fire-Net NCMs can be downloaded only
from an Underwriters Laboratories®, Inc. (UL) (Fire) OWS.
If you are having problems downloading through Port 2, 3, 5 or 6:
1. Test the download procedure with a known, good NCM.
2. Test the download procedure with a known, good OWS.