YOKOGAWA F3CU04-0S, User Manual

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B3-3
IM 34M06H62-02E 2nd Edition : June 2008-00
B3.1.3 Controller Mode
The controller mode parameters configure how loops are combined. The module
supports the single loop, two-input changeover, and cascade control modes. In the
two-input changeover or cascade control mode, two loops are combined and used as
one.

Single Loop Mode
This is the standard mode of use.
In this mode, each loop operates independently, and is
configured separately. The description from Section B3.2,
“Setting I/O Parameters,” to Section B3.4, “Operation,”
assumes the use of the single loop mode.

Two-input Changeover Mode
This mode uses two loops and switches between the two
inputs.
In this mode, setup and operation act on a pair of loops
(loops 1 and 2, or loops 3 and 4). Only the parameters of
loop 2 and 4 are used in control operation. The description
from Section B3.2, “Setting I/O Parameters,” to Section
B3.4, “Operation,” assumes the use of the single loop
mode. For details on setup and operation unique to the
two-input changeover mode, see Section C1.3, “Two-input
Changeover Control."

Cascade Control Mode
This mode uses two loops connected in series, with one
serving as the primary loop and the other as the
secondary loop.
In this mode, setup and operation act on a pair of loops
(loops 1 and 2, or loops 3 and 4). Only the parameters of
loop 2 or 4 are used in control operation. The description
from Section B3.2, “Setting I/O Parameters,” to Section
B3.4, “Operation,” assumes the use of the single loop
mode. For details on setup and operation unique to the
cascade control mode, see Section C1.2, “Cascade
Control."
PV2
OUT2
SP2
PV1
PID2
PV2
OUT2
SP1
PV1
PID2
PID1