Omron E5ZD, Руководство по эксплуатации

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6-1 Troubleshooting Lists
The following lists provide likely causes and solutions to common problems.
Relevant sections of this manual are given as reference.
The communications indicator on the E5ZD can be used to see if the E5ZD is
transmitting. The following are the probable causes of communications prob-
lems.
Possible cause Remedy Reference
Communications connector wired incorrectly Wire correctly Sec. 2-1-4
Communications connector loose Tighten the connector screws Sec. 2-1-4
Power supply is not connected or voltage is
incorrect Ensure that the correct power supply is connected to the
power connector. Sec. 1-4-3,
2-1-1
Power supply polarity is wrong Wire correctly Sec. 1-4-3,
2-1-1
E5ZD and host computer baud rates differ Set to same rate Sec. 1-4-3,
2-1-1
Communications format differs Set host computer to E5ZD format. Check errors at
E5ZD monitor indicator. Check reception with loop-back
text. Page 18
RS-232C IF
Unit number in command wrong Use the correct unit number (as set on E5ZD) Sec. 2-1-5
Same unit number assigned twice on same
transmission path. Ensure that different numbers are assigned to all Units
that communicate with the same host computer Sec. 2-1-5
Mode is set for test communications. Turn DIP switch setting to Normal Mode Sec. 2-1-5
Host computer program incorrect Debug program Sec. 4-1
Host starts next transmission before receiving
response Delay transmission until response is confirmed Section 5
False or erroneous signals received at the
host computer due to instability when switch-
ing the E5ZD ON and OFF Clear host computer reception buffer before beginning
transmission and after turning off E5ZD Sec. 4-2-25
There is an error on the E5ZD Read E5ZD error status and rectify error Sec. 4-1-2,
4-2-25
There is insufficient time between the time the
response is received and the time the next
instruction is transmitted. Leave a space of at least 10 ms before the next instruc-
tion is transmitted. Sec. 1-4-3
There is a communications data error due to
environmental noise. Use shielded cable.
Use optical interface.
Slow down transmission speed and try again.
Move communications cable away from the source of
noise. Sec. 3-2-3
For RS-422, a Link Adapter is being used in-
correctly. Check wiring with the Link Adapter manual. Page 20
RS-422 IF
Communications Not
Possible
Troubleshooting Lists
Section 6-1