5-26
RS-232 Communication Test, Cont.
When troubleshooting RS-232 mode, verify termination settings of Comm
1 J17 and Comm 2 J10 on XRC-195 have pins 2 and 3 jumpered.
Instructions
Step Procedure
Voltage on the following steps may be hard to see using a Digital
Multimeter. If available, an oscilloscope will provide a more accurate
reading. To verify, the Host software must be continuously polling the
XRC.
Generally speaking, these tests performed on the Terminal Board will only
verify incorrect or damaged wiring. If all previous testing passed, and all
wiring, jumper and terminations have been verified correct, the board will
need to be replaced. Contact Totalflow Customer Service. See “Getting
Help” in the introduction of this manual for instructions.
1.
Using an oscilloscope, measure Receiving Data voltage on
Termination Panel J8 or J10 between:
COMM 1 or 2, Pin 2 (Ground) and Pin 7 (Receive Data)
When the unit is receiving data from Host, voltage should vary
between -5 VDC and +5VDC. This would indicate that the unit is
receiving data, continue to Step 2. If unit is not receiving data,
investigate wiring issues (see Table 5–3).
2.
Using an oscilloscope, measure Request to Send voltage on
Termination Panel J6 between:
COMM 1 or 2, Pin 2 (Ground) and Pin 5 (Request to Send)
When unit is communicating to with Host, voltage should be
+5VDC and 5VDC until XRC transmit stops. This would
indicate that the unit is transmitting data, continue to Step 3. If
unit is not receiving data, investigate wiring issues (see Table 5–
3).
3.
Using an oscilloscope, measure Transmit Data voltage on
Termination Panel J8 or J10 between:
COMM 1 or 2, Pin 2 (Ground) and Pin 9 (Transmit Data)
When the unit is transmitting to Host, voltage should vary
between -5 VDC and +5VDC. This would indicate that the unit is
transmitting data. If unit is still not responding, continue to next
test as directed in
Figure 5–8
.
Summary of Contents for XRC6490
Page 1: ...2100802 001 AB TOTALFLOW XSeries Remote Controller User s Manual ...
Page 6: ...iv B B Bl lla a an n nk k k P P Pa a ag g ge e e ...
Page 10: ...viii B B Bl lla a an n nk k k P P Pa a ag g ge e e ...
Page 19: ...1 5 Standard Enclosure Cont RC 6790 X Figure 1 2 Model XRC6790 Continued on Next Page ...
Page 41: ...1 27 Totalflow Input Output Modules Cont Figure 1 16 XRC6990 Inside View ...
Page 42: ...1 28 B B Bl lla a an n nk k k P P Pa a ag g ge e e ...
Page 64: ...2 22 B B Bl lla a an n nk k k P P Pa a ag g ge e e ...
Page 86: ...4 12 Replacing XRC 195 Board Cont Figure 4 5 XRC Board Connections ...
Page 88: ...4 14 B B Bl lla a an n nk k k P P Pa a ag g ge e e ...
Page 112: ...5 24 12V Communication Supply Voltage Test Cont Figure 5 9 XRC 195 Communication Wiring ...
Page 292: ...A 176 B B Bl lla a an n nk k k P P Pa a ag g ge e e ...
Page 340: ...B 48 B B Bl lla a an n nk k k P P Pa a ag g ge e e ...
Page 342: ...C 2 B B Bl lla a an n nk k k P P Pa a ag g ge e e ...
