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HA71 Digital Gas Controller
Revision 3 (04/08)
HA71 Technical Manual
4-2
4.0 System Diagnostics
A System Diagnostic Mode shown in Figures 4-1 and 4-2 may be
entered during normal operation from the Setup menu. The entry menu
indicates firmware revision and offers useful routines for testing front
panel LED’s, relays, serial ports and analog I/O. It is exited manually
by pressing NEXT, and automatically if no keys are pressed for 5
minutes.
CAutIoN
It is very important to understand that CHANNEL INPUT DATA IS NOT
PROCESSED DURING THE DIAGNOSTICS MODE. It is possible to miss
important input values while utilizing this mode and appropriate
safeguards should be in place. However, the Diagnostics Mode can
prove invaluable when testing I/O since relays and analog outputs
may be stimulated without driving inputs to precise levels.
Figure 4-1. System Diagnostic Mode (Part 1)
Summary of Contents for HA71
Page 5: ...HA71 Digital Gas Controller Revision 3 04 08 HA71 Technical Manual 1 1 1 General Description ...
Page 9: ...HA71 Digital Gas Controller Revision 3 04 08 HA71 Technical Manual 2 1 2 Basic Operation ...
Page 31: ...HA71 Digital Gas Controller Revision 3 04 08 HA71 Technical Manual 4 1 4 System Diagnostics ...
Page 34: ...HA71 Digital Gas Controller Revision 3 04 08 HA71 Technical Manual 5 1 5 Modbus RS 485 Ports ...
Page 42: ...HA71 Digital Gas Controllers Revision 3 04 08 HA71 Technical Manual 6 1 6 HA71 Enclosures ...
Page 49: ...HA71 Digital Gas Controller Revision 3 04 08 HA71 Technical Manual A 1 A Ordering Information ...
Page 52: ...HA71 Digital Gas Controller Revision 3 04 08 HA71 Technical Manual B 1 B Warranty ...