Pb2Sw - Pb2 Switch - Siemens 353 User Manual

Function Blocks

3.2.64 PB2SW - PB2 Switch

PB2SW is one of three general purpose switches
available in each loop. It can be utilized for switching
Boolean signals in such applications as: toggling the E/I
(External/Internal setpoint Transfer Switch) function
block, Start/Stop, controlling the position of a TSW
(Transfer Switch) function block for switching analog
signals, or other operator initiated actions.
The switch can be configured for momentary or
sustained operation. As momentary, the switch will
transfer to the NO position when the button is pressed
and will return when released. Momentary action is used
in toggle applications such as changing the function of
the E/I function block. In the sustained mode, the switch
will alternate positions each time the button is pressed.
An unconfigured NC input defaults to 0 and an
unconfigured NO input to 1. The button can be remotely
activated through a command over Modbus or
Modbus/TCP.
This block operates with an operator faceplate that includes green and red LEDs that are turned on using input MD.
A HI (1) input will turn on the Green LED and a LO the Red LED. The default connection will be the PS output of
the block but should be changed as required to display the correct status. The message parameters do not apply to
the current product.
PB2 Switch
Operator Display Interface
BOD LEDS
G
PB2
R
NC
NO
Momentary Action
X03127S0
BLOCK DIAGRAM
3-66
UOD MSG
MD HI AC
MD HI ST
*****
*****
MD LO ST MD LO AC
MD Input
***** *****
P B S witch
Output
Sustained Action
BOD - Basic Operator Display
MD - Message Display
UOD - Universal Operator Display
PB2 SWITCH
NC
NC Input
NO Input
NO
Message Display MD
A C T I O N Switch ACTION
P U L A S T P ower U p LAST
M D H I S T MD HI ST atus message
M D L O S T MD LO ST atus message
M D H I A C MD HI AC tion message
M D A C
L O MD LO AC tion message
I N P U T N C
INPUT NO
I N P U T N O
INPUT NC
N P U T
I M D INPUT MD
E S N
E xec. S eq. N o.
POWER UP - When the switch is configured for
momentary action, it will always power up in the
NC position. For sustained action, with the
POWER UP parameter set to YES, the switch will
power up in the last position during a hot or warm
start, and during a cold start will power up in the
NC position. When the POWER UP parameter is
MD
set to NO, the switch will power up in the last
position during a hot start. During a warm or cold
start, it will power up in the NC position.
PS
UM353-1B
ESN = 000
PB2SW
PS PB/Switch Output
PB2 Switch
................... MOM/SUS
(S)
...................... NO/YES
(S)
.. 5 ASCII Char (GREEN)
(S)
. 5 ASCII Char
(S)
... 5 ASCII Char
(S)
. 5 ASCII Char (GREEN)
(S)
...........
loop tag.block tag.output
(H)
...........
(H) loop tag.block tag.output
...........
(H) loop tag.block tag.output
..................... 001 to 250
(H)
April 2012
(MOM)
(YES)
(RED)
(RED)
(null)
(null)
(null)