30
PU-2A USERS
MANUAL EM-9255-C Rev.14
■
ANALOG BACKUP STATION model JB
(Group 01)
ITEM
MDFY.
DATA INPUT
DISPLAY
CONTENTS
01
S
MAINTENANCE SWITCH (lock command)
0
MTSW: MON.MODE
MONITOR mode: data monitoring only
1
MTSW: PRG.MODE
PROGRAM mode: “P” marked data modifiable*
1
02
P
Alphabets & No.
TG: XXXXXXXXXX
Tag name entry (10 characters max.)
03
04
05
06
D
D
D
D
No input
No input
No input
No input
OUTPER XXX.XX
OUTVAL XX.XXX
INPPER XXX.XX
INPVAL XX.XXX
Output status monitor (%)
Output status monitor (mA)
Input status monitor (%)
Input status monitor (mA)
10
P
WRITE DEFAULT
All default settings are done at once with this command.
ENTER
COMPLETED
21
P
MANUAL CONTROL MODE
This determines the way JB unit responds when it is switched to
manual operation mode. Default = 1
1
1:
DIRECT
MODE 1: Holds the CAS control signal at the moment of the MAN
command.
2
2:
TRACE BACK
MODE 2: Goes back to the preset time period (ITEM 28) and holds
the CAS control signal at that moment.
3
3: FIXED VALUE
MODE 3: Holds a specific value preset in ITEM 29.
22
P
Percentage
SLDBAK XXX.XX
TRANSITION RESPONSE
Unit: %/sec., 0.00 – 200.00%/sec. adjustable. When set to 0.00, JB
unit returns without any transition period back to CAS operation
with MAN command input OFF. Default = 0.00
23
P
UP/DOWN RESPONSE MODE
This determines the way the JB unit reponds when either UP or
DOWN key is pressed during MAN. mode. Default = 0
1
1:
UNIFORM
MODE 1: Responds at a constant rate while the key is pressed.
2
2:
ONE+UNIFORM
MODE 2: Responds once when the key is pressed and starts re
-
sponding at a constant rate after that if it is continuously pressed.
3
3: ACCELERATED
MODE 3: Responds in an increasing rate when the key is pressed
and starts responding at a constant rate after that.
24
P
Percentage
KEYRES XXX.XX
UP/DOWN RESPONSE TIME Default = 10.00
Unit: %/sec., 0.00 – 200.00%/sec. adjustable
25
P
HI/LO ALARM AT CASCADE CONTROL
Default = 0
0
0: NO ALARM
Without alarm setpoint
1
1:
LOW ALARM
With LOW setpoint only
2
2:
HIG ALARM
With HIGH setpoint only
3
3: ALL ALARM
With both HIGH & LOW setpoins
26
P
Percentage
ALMLOW XXX.XX
LOW alarm setpoint *
2
Unit: %, Default = -25.00
27
P
Percentage
ALMHIG XXX.XX
HIGH alarm setpoint *
2
Unit: %, Default = 125.00
28
P
Number
TRACEBACK XX.X
Retroactive time period, Default = 0.0
Unit: seconds, 0.0 – 10.0 adjustable
29
P
Percentage
MANFIX XXX.XX
Default output at manual control mode
Unit: %, -25.00 – 125.00 adjustable
Default = 0.00
30
P
Percentage
PWRFIX XXX.XX
Default output at manual control mode after power failure and
recovery, Default = -25.00
Unit: %, -25.00 – 125.00 adjustable
REMARK 1
: When the Maintenance Switch is turned to “PRG” mode, RUN output relay is open and its coil is de-energized.
REMARK 2 :
The HIGH and LOW alarm relays trip or reset when the CAS input signals vary as described in the following examples:
LOW ALARM RELAY TRIPS
when the decreasing CAS input signal equals or goes below the setpoint entered in ITEM 26 (GROUP 01).
[EXAMPLE]
When the setpoint is 0.00%, the relay trips when the CAS input equals or goes below 4.00 mA (0.00%).
LOW ALARM RELAY RESETS
when the CAS input signal increases and exceeds the setpoint value plus 1% of hysteresis (deadband).
[EXAMPLE]
When the setpoint is 0.00%, the relay remains tripped with the CAS input 4.160 mA (1.00%) and resets when it
reaches and exceeds 4.162 mA (1.01%).
HIGH ALARM RELAY TRIPS
when the increasing CAS input signal equals or exceeds the setpoint entered in ITEM 27 (GROUP 01).
[EXAMPLE]
When the setpoint is 100.00%, the relay trips when the CAS input equals or exceeds 20.00 mA (100.00%).
HIGH ALARM RELAY RESETS
when the CAS input signal decreases and goes below the setpoint value minus 1% of hysteresis (deadband).
[EXAMPLE]
When the setpoint is 100.00%, the relay remains tripped with the CAS input 19.840 mA (99.00%) and resets
when it reaches and goes below 19.839 mA (98.99%).
