Oeu Termination Strip Test - ABB XSeries G4 6200 User Manual

1) Using an oscilloscope, measure the receiving data voltage on the
2) Using an oscilloscope, measure the request to send voltage on the
3) Using an oscilloscope, measure the transmit data voltage on the termination
5.4.9 RS-232 OEU termination strip test
5.4.9.1
1) Using a oscilloscope, if available, measure the receiving data on the G4 EX
2104349 rev. AD
termination board, J19 or J20, between:
COMM 1, J19–Pin 2 (GND) and Pin 8 (RXD) or
COMM 2, J20–Pin 2 (GND) and Pin 8 (RXD)
When the unit is transmitting to WinCCU, the voltage should vary between -
5 VDC and +5 VDC. This would indicate that the unit is receiving data;
continue to step 2. If the unit is not receiving data, investigate the wiring
issues (see Table 5–3).
termination board J19 or J20 between:
COMM 1, J19–Pin 2 (GND) and Pin 6 (RTS) or
COMM 2, J20–Pin 2 (GND) and Pin 6 (RTS)
When the unit is communicating to WinCCU, the voltage should be +5
VDC and remain at +5 VDC until the G4 EX transmit stops. This
would indicate that the unit is transmitting data; continue to step 3. If the unit
is not receiving data, investigate the wiring issues (see Table 5–3).
board, J19 or J20 between:
COMM 1, J19–Pin 2 (GND) and Pin 7(TXD) or
COMM 2, J20–Pin 2 (GND) and Pin 7 (TXD)
When the unit is transmitting to WinCCU, the voltage should vary between -
5 VDC and +5 VDC. This would indicate that the unit is transmitting data. If
the unit is still not responding, continue to the next test as directed in Figure
5–7.
Generally speaking, these tests
termination strip will only verify incorrect or damaged wiring.
If all previous testing passed and all wiring, jumper and
terminations have been verified as correct, the termination
strip may need to be replaced but does not typically fail.
Contact Totalflow Customer Service. See the Getting Help
section for instructions.
Please note that NO wire colors are referenced. Individual
units may vary.
Voltage on the following steps may be difficult to see using a
Digital Multi-meter (DMM). If available, an oscilloscope will
provide a more accurate reading. To verify, the WinCCU
software must be continuously polling the meter.
Step-by-step instructions
side of the OEU termination strip (see Figure 5–8) between:
GND and RXD
performed on the
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