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SP2F Function: Define format of SP2 value . If SP2F in the setup menu is
SP2F Function: Define format of SP2 value . If SP2F in the setup menu is
selected with ACTU, the event input function will use SP2 value for its second
selected with ACTU, the event input function will use SP2 value for its second
set point. If SP2F is selected with DEVI, the SP1 value will be added to SP2.
set point. If SP2F is selected with DEVI, the SP1 value will be added to SP2.
The sum of SP1 and SP2 (SP1+SP2) will be used by the event input function
The sum of SP1 and SP2 (SP1+SP2) will be used by the event input function
for the second set point value. In certain applications it is desirable to move
for the second set point value. In certain applications it is desirable to move
second set point value with respect to set point 1 value. The DEVI function for
second set point value with respect to set point 1 value. The DEVI function for
SP2 provides a convenient way in this case.
SP2 provides a convenient way in this case.
Modification from RS-232 to Event input:
Modification from RS-232 to Event input:
Because of limitation of pin number, pin 11 is used for both Event input and
Because of limitation of pin number, pin 11 is used for both Event input and
RS-232. If you want to change function of BTC-2500 from RS-232 to event
RS-232. If you want to change function of BTC-2500 from RS-232 to event
input, you
input, you
must
must
modify jumper J51 and J52 on CPU board by opening jumper
modify jumper J51 and J52 on CPU board by opening jumper
J52 and shorting jumper J51. Refer to
J52 and shorting jumper J51. Refer to
J51/J52.
J51/J52.
4 2 Second Set Point
4 2 Second Set Point
In certain applications it is desirable to change the set point automatically
In certain applications it is desirable to change the set point automatically
without the need to adjust the set point. You can apply a signal to event input
without the need to adjust the set point. You can apply a signal to event input
terminals ( pin 10 and pin 11 ).The signal applied to event input may come
terminals ( pin 10 and pin 11 ).The signal applied to event input may come
from a
from a
Timer
Timer
, a
, a
PLC
PLC
, an
, an
SP2 for EIFN which is contained in setup menu.
SP2 for EIFN which is contained in setup menu.
This is available only with the case that SP1.2, MIN.R or HR.R is used for
This is available only with the case that SP1.2, MIN.R or HR.R is used for
SPMD, where MIN.R and HR.R are used for the ramping function.
SPMD, where MIN.R and HR.R are used for the ramping function.
See
See
Section 4-4.
Section 4-4.
Application 1: A process is required to be heated at a higher temperature as
Application 1: A process is required to be heated at a higher temperature as
soon as its pressure exceeds a certain limit. Set SPMD=SP1.2, EIFN=SP2 ( or
soon as its pressure exceeds a certain limit. Set SPMD=SP1.2, EIFN=SP2 ( or
SP .P2 if the second PID is required for the higher temperature too ).
SP .P2 if the second PID is required for the higher temperature too ).
The pressure gauge is switched ON as it senses a higher pressure. Connect
The pressure gauge is switched ON as it senses a higher pressure. Connect
the output contacts of the pressure gauge to the event input. SP1 is set with a
the output contacts of the pressure gauge to the event input. SP1 is set with a
normal temperature and SP2 is set with a higher temperature. Choose ACTU
normal temperature and SP2 is set with a higher temperature. Choose ACTU
for SP2F.
for SP2F.
Application 2: An oven is required to be heated at 300 C from eight o'clock
Application 2: An oven is required to be heated at 300 C from eight o'clock
AM to six o'clock PM. After six o'clock PM it is desirable to be maintained at
AM to six o'clock PM. After six o'clock PM it is desirable to be maintained at
L
L
80 C. Use a programmable 24 hours cycle timer for this purpose. The timer
80 C. Use a programmable 24 hours cycle timer for this purpose. The timer
output is used to control event input. Set SPMD=SP1.2, and EIFN=SP2 ( or
output is used to control event input. Set SPMD=SP1.2, and EIFN=SP2 ( or
SP .P2 if the second PID is required to be used for the second set point ).
SP .P2 if the second PID is required to be used for the second set point ).
L
L
SP1 is set with 300 C and SP2 is set with 80 C. Choose ACTU for SP2F. After
SP1 is set with 300 C and SP2 is set with 80 C. Choose ACTU for SP2F. After
six o'clock PM the timer output is closed. The event input function will select
six o'clock PM the timer output is closed. The event input function will select
L
L
SP2 ( =80 C) to control the process.
SP2 ( =80 C) to control the process.
Refer to
Refer to
Section 4-1
Section 4-1
for more descriptions about
for more descriptions about
Section 2-16
Section 2-16
Alarm Relay
Alarm Relay
, a
, a
Manual Switch
Manual Switch
L
L
for the location of jumper
for the location of jumper
or other devices. Select
or other devices. Select
L
L
SP2F
SP2F
function.
function.
UM25001C
SP2F=Format of SP2 Value
SP2F=Format of SP2 Value
ACTU: SP2 is an actual value
ACTU: SP2 is an actual value
DEVI: SP2 is a deviation value
DEVI: SP2 is a deviation value
Apply Signal To
Apply Signal To
11
Event input +
Event input +
10
Event input
Event input
Setup
EIFN choose SP2 or SP .P2
EIFN choose SP2 or SP .P2
Availability
Availability
SPMD choose
SPMD choose
or
or
Format of SP2 Value
Format of SP2 Value
SP2F choose
SP2F choose
Actual Value
Actual Value
or
or
Deviation Value
Deviation Value
69
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