I/O And Loop Function Blocks; A/M - A/M Transfer - Siemens 353 User Manual

UM353-1B

3.2 I/O AND LOOP FUNCTION BLOCKS

This section provides a detailed description of each input/output and loop function block. Blocks are listed
alphabetically.

3.2.1 A/M - A/M Transfer

One A/M function block can be used per loop and it is
normally used on the output of controller blocks to
enable auto/manual operation of the loop. It is separate
from the controller block allowing the option of
inserting other function blocks (e.g. override,
feedforward) between the controller and the A/M
Transfer. If function block PB3SW has been used, the
A/M block is not available.
AUTO allows the signal from the controller (input A) to
become the output of the A/M Transfer unless EMER
MAN or STANDBY is active. Auto ONLY forces the
operator pushbutton to be locked in the AUTO position,
but EMEG MAN and STANDBY will function
normally.
MANual allows the operator to adjust the manual value
unless STANDBY is active. The manual value tracks
the block output when in AUTO or STANDBY. The
manual value can be adjusted when in MAN, provided
the displayed variable is the process or the valve (e.g.
TC2053.P or TC2053.V). When a loop is switched to
MANual the display will automatically show the valve
(e.g. TC2053.V). The range pointer (input Range) lets
the A/M function block know the range of the auto input
signal and enables the A/M block to properly process
pulser changes from the operator faceplate. The range pointer also defines the range of the manual function as -
10% to 110%. This can be useful to prevent inadvertent changes from an operator workstation that might set the
manual value well beyond the local operator's changeable range. In most cases, the Range input (range pointer)
will connect to the controller function block. An unconfigured range pointer will default the range to 0.00 - 100.00.
Auto
A
TV
.
TC
EM
X03129S0
April 2012
Pulser
G
A
M
R
1
M
Track Variable
Track Command
Emergency Manual
A/M TRANSFER
R
Range
A
Auto Input
Track Variable TV
Track Command TC
EM
Emerg. Man.
R G P T R
RanGe PoinTeR
P U M A N
Power Up MANual
A O N L Y
Auto ONLY
P O W E R U P
POWER UP position
P L A S T
U
Power Up LAST
C W M A N
ClockWise MAN
M A N A C C L
MANual ACCeLeration
E M P R I O R
Emerg Manual PRIORity
E M M A N
Emerg Man switches to MAN .. NO/YES Emerg Man switches to MAN .. NO/YES
L O C K M A N
LOCK MAN in Emerg Man ...... NO/YES
S B P R I O R
StandBy PRIORity
I N P U T A
INPUT A
I I N N P P U U T T T T V
INPUT TV
I I P P U U T T T C
N N
INPUT TC
N N P P U U T T
I I E M
INPUT EM
E S N
Exec. Seq. No.
AUTO
MAN
2
3
BLOCK DIAGRAM
Function Blocks
A/M ESN = 000
O1 Output 1
AS Auto Status
A/M
Not Auto status
TRANSFER NA
MS
Manual Switch
ES EM Switch
SS Standby Switch
.......
(S) loop tag.block tag
.................... Real
(S)
......................... NO/YES
(S)
.................. A/M
(S)
................. NO/YES
(S)
............ NO/YES
UAL (S)
..
(S) Slow, Med, Fast
. 0,1,2,3,4,5
(S)
........... 0,1,2,3,4,5
(S)
..........
loop tag.block tag.output
(H)
.......
loop tag.block tag.output
(H)
........
loop tag.block tag.output
(H)
.......
loop tag.block tag.output
(H)
................ 001 to 250
(H)
Output
Auto Status
Not Auto Status
1
2
3
(null)
(0.0)
(NO)
(A)
(YES)
(YES)
(S) *
(4)
(NO) * (NO) *
(NO) *
(4)
(null)
(null)
(null
)
(null)
O1
AS
NA
MS
ES
SS
3-7