Emerson Tescom ER5000 Series User Manual page 207

ER5000 — Troubleshooting
Operation
Checking the Configuration of the Jumpers (cont.)
While it is rare, electrical noise can at times cause a problem in an
ER5000 control system. Electrical noise is defined as "unwanted,
random fluctuations in an electrical signal." It is difficult to
identify sources of noise when transferring analog signals across
a process plant or factory floor or in the confines of a test stand
that is densely populated with various electrical, mechanical and
electromechanical devices.
The ER5000 grounding system was designed to minimize noise
issues by separating the signal ground from the power/board
ground with a low-pass filter. However, if you are having issues
with noise, installing this jumper may help.
The ER3000/ER5000 Mode Select Jumper
By default, the ER5000 uses a 16-bit A/D converter to translate
analog input signals to digital. The previous model, the ER3000,
used a 12-bit converter. For applications where the ER5000 will
be controlled by software originally written for the ER3000,
Jumper J9 allows the ER5000 to switch from 16-bit to 12-bit A/D
conversion and the application will integrate the new controller
without requiring a rewrite of the software.
If Jumper J9 is ON, some of the new features of the ER5000
will not function, including Suspend Mode and some Profile
commands (Soak, If, Goto). Also some internal variables switch
from 16-bit to 12-bit and must be configured to the correct scale.
Refer to the Internal Variables
the affected variables.
section for specific information on
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