A5.9 Block Modes; A5.9.1 Mode Transitions - YOKOGAWA Admag TI Series User Manual

A5.9 Block Modes
The block mode is defined with the parameter MODE_BLK.
Target
Actual
MODE_
BLK
Permitted
Normal
There are eight modes for the PID block as shown below.
Block
Mode
ROut Remote output mode. The mode outputs the value given by ROUT_IN.
By the remote cascade connection, the setpoint (SP) is received from the
RCas host computer, etc., and results of the PID control calculation processing are
output.
By the cascade connection, the setpoint (SP) is received from other function
Cas
block, and results of the PID control calculation processing are output.
The PID block carries out automatic control and outputs the result calculated
Auto
by the PID control computation.
The block goes into manual mode, and outputs OUT, the value set by the user
Man
manually.
LO The PID block outputs the operation output value set in TRK_VAL.
Initialization and manual mode. This mode temporarily interrupts the control
IMan operation. The mode which operates when the initialization and manual
fallback conditions shown in Section A5.14 are met.
Control calculation processing is carried out. The output of the previous value
O/S
is kept.
A5.9.1 Mode Transitions
Destination
(1) O/S
(2) IMan
(3) LO
(4) Man
(5) Auto
(6) Cas
(7) RCas
(8) ROut
Note 1: To activate mode transitions to Auto, Cas, RCas, and ROut, the respective target modes
must be permitted beforehand with MODE_BLK.permitted.
Defines the target mode.
Indicates the current block mode.
Changes depending on the status of input data and target
contents.
Defines constraints of the target mode.
If constraints are not defined here, it becomes impossible to
transition to the mode.
Defines the normal mode.
Description
Condition
If O/S is specified in MODE_BLK.target
(or if O/S is set in target inside the resource block)
If the Initialization and manual fallback conditions are met
(Section A5.14)
If Track Enable is specified in CONTROL_OPTS and the
value of TRK_IN_D is true
If MAN is specified in MODE_BLK.target or if IN.status
(input status) is BAD
If Auto is specified in MODE_BLK.target
- AND -
if IN.status (input status) is other than BAD
If Cas is specified in MODE_BLK.target
- AND -
if IN.Status (input status) and CAS_IN.Status are other
than BAD
If RCas is specified in MODE_BLK.target
- AND -
if IN.Status (input status) and RCAS_IN.Status are other
than BAD
If ROut is specified in MODE_BLK.target
- AND -
if ROUT_IN.status (input status) is other than BAD
<Appendix 5. PID Block>
Other Condition
NOT if condition (1) is met
NOT if either or both of
conditions (1) and (2) are met
NOT if any one or more of
conditions (1) to (3) are met
NOT if any one or more of
conditions (1) to (3) are met
NOT if any one or more of
conditions (1) to (3) are met
NOT if any one or more of
conditions (1) to (3) are met
NOT if any one or more of
conditions (1) to (3) are met
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