120
SCADA-Modbus
®
System Guidelines
950 SCADA-Modbus “No Response” Troubleshooting Flow Chart (2 of 5)
Does the
baud rate of the 950
match that of the
Master device?
Set the baud rate of the
950 to match that of
the Modbus master
device.
No
Yes
Continued from sheet 1
Is there a
constant 5-18 VDC
between pins C and
B (Gnd) of the RS-232
cable that is attached
to the 950 ?
Configure the Master device
that is communicating with the
950 to keep the DTR
(Pin "C") of the flow meter
constantly held high for the
duration of all communications.
No
Yes
This section does not apply
to Modem Communications
Continued on sheet 3
Is the
Master device
configured for 7 data
bits, 1 stop bit, even
parity ?
Can the
Master device be
configured for 7,
even, 1 ?
No
Configure the Master
device for 7 data bits,
even parity, 1 stop bit.
Yes
Obtain a protocol
converter to convert
the communication
parameters to 7 data
bits, even parity ,1 stop
bit
No
Yes
Содержание Sigma 950
Страница 2: ......
Страница 6: ...4...
Страница 20: ...18 Introduction...
Страница 34: ...32 Basic Programming Setup...
Страница 50: ...48 Sensor Installation...
Страница 82: ...80 Maintenance...
Страница 83: ...81 Appendix A Program Flow Charts Figure 22 Overview of Basic Program Menus...
Страница 84: ...82 Program Flow Charts Figure 23 Setup Flow Chart...
Страница 85: ...83 Program Flow Charts Figure 24 Options Flow Chart...
Страница 86: ...84 Program Flow Charts Figure 25 Alarms Menus Flow Chart...
Страница 87: ...85 Program Flow Charts Figure 26 Calibration Menus Flow Chart Page 1...
Страница 88: ...86 Program Flow Charts...
Страница 102: ...100 Programming Features...
Страница 106: ...104 Primary Devices Head Measurement Locations...
Страница 126: ...124 SCADA Modbus System Guidelines...