5-44
Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION
SP ramp type
Whether or not the step operation is performed can be selected.
Additionally, the operation when the power is returned after a power cut
occurrence during step operation can also be selected.
Item (Bank) Display Contents Initial value User level
SP ramp type
(Setup bank)
0: Standard
1: Multi-ramp
2: Step operation The step operation
is stopped when the power restarts
(READY).
3: Step operation The step operation is
recovered when the power restarts.
0 High function
• To make the step operation enabled, “2” or “3” is set.
• In case of set at “2”, the operation is stopped (READY mode) and returned to the
top of the step when the power is returned after the power cut occurs while the
step operation is running (RUN mode).
• In case of set at “3”, the operation is restarted from the step before a power cut
occurs when the power is returned after the power cut occurs while the step
operation is running (RUN mode). However, the SP and time before the power
cut cannot be returned completely and the step operation is restarted as described
in the following:
If the operation before the power cut is SOAK, the operation is restarted from
the beginning of the SOAK portion. If the operation before the power cut is
RAMP and the PV alarm (
AL0
1
/
02
) does not occur, the RAMP operation
is restarted from the SP same as PV. If the operation before the power cut
is RAMP and the PV alarm (
AL0
1
/
02
) occurs, the operation moved to the
SOAK portion next to the RAMP.
Handling Precautions
• The operation of this unit with the setting set at “3” (step operation,
operation is recovered when the power restarts) is different from that
of Azbil Corporatin’s digital programmable controller model DCP-series
(DCP31/32, DCP551/552). The DCP-series functions so that the SP, RAMP,
or SOAK elapse time immediately before the power cut continues even
after the power has been turned ON again. However, this unit functions
so that the operation is returned to the start point of the RAMP or SOAK
portions, which has been operated immediately before the power cut has
occurred.
• When the setting is set at “3” (step operation, operation is recovered when
the power restarts), it is also necessary to carefully check the number
of EEPROM (nonvolatile memory) writing cycles. When the operation
step proceeds in the RUN mode, the data is written into the EEPROM
(nonvolatile memory) every time the RAMP or SOAK is changed. If the
step operation is continued with a RAMP or SOAK operation time of
10min or less, the erase/write cycles of EEPROM may exceed its service
life (approximately 100,000 cycles) within two years. Therefore, do not
attempt to operate the unit in such manner.
• When the SP ramp type is set at “standard” or “multi-ramp” (
C3
1
=
0, 1) and the operation mode is the RUN mode, the operation mode
is automatically changed to the READY mode if the SP ramp type is
changed to “step operation” (
C3
1
= 2, 3).
• When the step operation is set enabled, the LSP mode is fixed and the
LSP/RSP selection cannot be performed.
To Next Page
Loading...
