How To Use The Remote Sp; Sp Mode - Omron E5AK User Manual

4.4 How to Use the Remote SP

J Scaling
F Relationship with
set point limiter
J SP mode
LSP

SP mode

RSP
RSP enable
• Taking a remote SP input (4 to 20 mA) as the set point is referred to
as the "remote SP" function. The remote SP function is enabled only
when the "remote SP (RSP) enable" parameter (option mode) is set to
"ON".
• Remote SP upper-and lower-limit values can be set by scaling.
• Inputs within the range 4 to 20 mA (-10 to 110%) are allowed as
remote SP inputs. Inputs not within this range are regarded as out-of-
range input values. In this case, input is clamped at the remote SP
lower or upper limit values, and the "RSP" LED blinks.
• If the output function "RSP input error" is assigned for when an out-
of-range remote SP is input, the "RSP input error" output is turned
ON. Control output also switches to the setting of the "MV at PV
error" parameter.
• Set the upper limit value in the "remote SP upper limit" parameter
and the lower limit value in the "remote SP lower limit" parameter
(option mode).
RSP (%)
Upper limit value
Lower limit value
• When the "Set point upper limit" or "Set point lower limit" parame-
ters are changed, the remote SP upper-and lower-limit values are for-
cibly changed to the set point upper-and lower-limit values. The fol-
lowing example shows how the remote SP upper-and lower-limit
values are changed when the set point upper limit value is changed
from A to B.
Before change
Changed to
upper limit value
Upper-and lower-limit values of the limiter
RSP scaling upper-and lower-limit values
• The set point held internally by the E5AK controller is referred to as
the "local SP (LSP)."
• If the multi-SP function is enabled, set points 0 to 3 are enabled for
use as the local SP .
• Use the "SP mode" parameter to switch between the remote SP and
local SP . When the SP mode parameter is set to "
the "RSP" LED lights. When the SP mode parameter is set to
" ", the controller is in the local SP mode.
4.4 How to Use the Remote SP
Out-of-range input
(blinks of upper-and lower-limit values)
4 20
21.6 (-110%)
2.4 (-10%)
Set point limiter
RSP scaling range
B
Input (mA)
A
Set point
Upper limit value
changed from A to B
Set point
" (remote SP),
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