Function Blocks UM353-1B
April 2012
3-66
PB2 SWITCH
PB2SW
ESN =
000
PB2 Switch
P
B/
S
witch Output
I
E
S
N
E
xec.
S
eq.
N
o.
(H)
..................... 001 to 250
PS
NC
NC
Input
TM
MD
HI
ST
atus message
(S)
.. 5 ASCII Char (GREEN)
S
DH
OSTM
D
L
IACMD H
O
ACM
DL
NPUTI NC
INPUT NO
(H)
...........
loop tag.block tag.output (null)
MD
LO
ST
atus message (S) . 5 ASCII Char (RED)
MD
HI
AC
tion message
(S)
... 5 ASCII Char (RED)
MD
LO AC
tion message
(S)
. 5 ASCII Char (GREEN)
NO
MD
M
essage
D
isplay
NO
Input
S
T
U
ALP
O
N
AITC
P
ower
U
p
LAST
(S) ...................... NO/YES (YES)
Switch
ACTION
(S)
................... MOM/SUS (MOM)
NP
U
TI
NO
NPUT
I
MD
INPUT NC
(H)
...........
loop tag.block tag.output
(null)
INPUT MD
(H)
...........
loop tag.block tag.output (null)
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.
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
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.
R
G
MD
PS
MD Input
P
B
S
witch
Output
Operator Display Interface
UOD MSG
PB2 Switch
MD HI ST
MD HI AC
MD LO ST MD LO AC
PB2
BOD LEDS
Momentary Action
Sustained Action
NO
NC
*****
*****
**********
BLOCK DIAGRAM
BOD - Basic Operator Display
MD - Message Display
UOD - Universal Operator Display
X03127S0
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