YOKOGAWA UP35A, User Manual

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9-32
IM 05P02D41-01EN
9.8.3 Local-mode switching (JC=LOCAL)
Description
When the last segment of program operation ends, the state becomes the local operation
state. After the program operation ends, the action is performed by the on/off operation
of SP tracking (SPT) and junction code (JC) as follows. When zone PID selection is
selected, the action is controlled according to zone selection, and when segment PID
selection is selected, the action is controlled according to local PID number selection
(L.PID).
Local control (JC=LOCAL) can be set only for the last segment in the program pattern.
If set for a segment in the middle of the program, the program will act as if program
continue (JC=CONT) were set as the segment end condition.
When setpoint tracking is ON
At the end of the last segment in the program, the local (constant setpoint) mode is
engaged. In this case, the target setpoint of the last segment is used as the target
setpoint of the local mode. The local setpoint can be set in advance, but when setpoint
tracking is ON, the target setpoint of the last segment in the program will be tracked and
used regardless of the local target setpoint. Even in the local mode, the current PV event
continues to operate (but the time event is off). The contents that are set in advance as
local events are changed to PV events when in local mode. If no PV events are set in the
program, events set as local events in advance are all off.
Setpoint
Time
Last segment
Program pattern operation stop (PRG → LOC)
Local operation
Local target
setpoint (LSP)
in Local mode.
SP tracking ON
9.8 Setting the Operation in Segment Switching