119
SCADA-Modbus
®
System Guidelines
950 SCADA-Modbus “No Response” Troubleshooting Flow Chart (1 of 5)
No response to polling
Message
Is the 950
turned on and power
applied ?
Apply power and turn
the Meter on by
pressing the "ON"
button.
No
Yes
Is the
protocol of the Master
device Modbus
ASCII ?
Can the
protocol of the Master
device be changed to
Modbus ASCII ?
Change the protocol of
the Master device to
Modbus ASCII
No
Yes
Yes
Obtain a protocol
converter to convert
from the existing
protocol to Modbus
ASCII.
No
Continued on sheet 2
Is this
the first time this
meter has ever been
used with
Modbus ?
Yes
Has the
meter worked with
Modbus
before ?
No
No
Turn the 950 off and
then turn it back on
again. This will reset
the communications
buffer.
Yes
Determine the flash
(embedded) code version
by turning the meter off and
then back on again and
observing the value on the
display.
Is the
flash code version
6.0 or later ?
No
STOP !
Only 950 with flash code
version 6.0 or later are
compatible with Modbus
Yes
Is the
meter responding
now ?
No
Set the polling device
"Time Out" period to 12
seconds or greater to
prevent future
communication buffer
overflows.
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...