46
Digital Position-Proportional Controllers
E5EZ-PRR
■
Trouble
shooting
When an error occurs, the main display alternately shows an error signal and
the current item for display.
This section explains how to inspect an error signal, as well as corresponding
rectification measures.
• Meaning
The figure inputted has exceeded the designated input range (the designated
range is between -1999 (-199.9) to 9999 (999.9)).
• Rectification
Measures
Check to make sure that the input line has not been connected incorrectly,
unplugged, a short-circuit, or is incompatible with this input type.
If there are no problems with the line type or the connection, power off and then
restart the unit. If the display remains unchanged, it will be necessary to change
the E5EZ-PRR. If the display is recovered, the root of the problem may have
been that noise from the energy flow was affecting the control system. Check for
any such noise.
• Operations
with
Errors
The control output will be determined according to the designated value for
error MV.
The alarm output function will be the same as it is when the upper limit is
crossed.
After setting I/O error (advanced function setting level) on, alarm 1's output will
be activated in cases of error.
In process value or process value/ set value/ valve open percentage display
mode, error information will be displayed.
• Meaning
Even though this is not really an error, when the range of control exceeds the
range of display (-1999 (-199.9) to 9999 (999.9)), and the process value is
beyond the range of display, this signal will appear.
•
Will display
[[[[
when the figure is less than -1999 (-199.9).
•
Will display
]]]]
when the figure is more than 9999 (999.9).
• Operations
with
Errors
Control will continue and operations will remain normal. In process value or pro-
cess value/ set value/ valve open percentage display mode, error information will
be displayed.
5.err
Input Error
Display Range Exceeded
