ER5000 —
207
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 dened as “unwanted,
random uctuations in an electrical signal.” It is difcult to
identify sources of noise when transferring analog signals across
a process plant or factory oor or in the connes 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 lter. 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 Prole
commands (Soak, If, Goto). Also some internal variables switch
from 16-bit to 12-bit and must be congured to the correct scale.
Refer to the Internal Variables section for specic information on
the affected variables.
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