Dwyer DPW - Manual (Page 19)

Command
Name
Flow Alarms
Temperature
Alarms**
Optical
Outputs
Main
Totalizer
Description
Sets / reads the status of the
flow alarms.
Note: High and Low limits have to
be entered in the % FS. High
alarm value has to be more than
Low alarm value.
Alarm conditions:
Flow > High Limit = H
Flow < Low Limit = L
Low < Flow < High = N
Sets/reads the status of the
temperature alarms.
Note: High and low limits have to
be entered in the °C. High alarm
value has to be more than Low
alarm value.
Alarm conditions:
Temp. > High Limit = H
Temp. < Low Limit = L
Low < Temp. < High
Assigns action of the two
optical outputs. The optical
output becomes active when
the condition specified by an
Argument 2 becomes true.
Argument 2:
D - no action, disabled*
FL - low flow alarm
FH - high flow alarm
FR - Range between High &
Low alarms
MT - main tot. reading > limit
PT - pilot tot. reading > limit
TL - low temp. alarm
TH - high temp. alarm
TR - Range between High &
Low temp. alarms
MC - Manual On Control
DE - Diagnostic Events
Sets and controls action of the
Main flow totalizer.
Note:
Main Totalizer reading is
stored in EEPROM (non
volatile) memory. Power cycle
will not affect Main Totalizer
reading.
No.
6
7
8
9
Command
FA
TA
0
MT
Argument 1
H (high flow limit)
L (low flow limit)
A (action delay in
seconds)
E (enable alarm)
D (disable alarm)*
R (read current
status)
S (read current
status)
B Block (latch)
mode
H (high flow limit)
L (low flow limit)
A (action delay in
seconds)
E (enable alarm)
D (disable alarm)*
R (read current
status)
S (read current
settings)
B Block (Latch)
mode
1 (output #1)
2 (output #2)
Z (reset to zero)
F(start totalizer at
flow % FS)
L (limit gas volume
in current E.U.)
D (disable
totalizer)*
E (enable totalizer)
R (read current
totalizer volume)
S (setting status)
Argument 2
(0 to
100% FS)
(0 to
100% FS)
(0 to 3600
sec)
(0 to disabled*)
(1 to enabl’d L)
2 to enabl’d H)
(e to both L, H)
(-10.1 to 100°C)
(-10.1 to 100°C)
(0 to 3600 sec.)
(0 to disabled*)
(1 to enabl’d L)
(2 to enabl’d H)
(3 to both L, H)
D*
FL
FH
FR
MT
PT
TL
TH
TR
DE
MC
S (read current
settings)
Argument 3 Argument 4 Response
FAH:
FAL:
FAA:
FA:E
FA:D
FA:N (no alarm)
FA:H (high alarm)
FA:L (low alarm)
FAS:M,L,H.D,B where:
M - mode (E/D)
L - low settings (%FS)
H - high settings (%FS)
D - Action delay (sec)
B - Latch mode (0 to 3)
FAB: where:
Value = 0 to 3
TAH:
TAL:
TAA:
TA:E
TA:D
TA:N (no alarm)
TA:H (high alarm)
TA:L (low alarm)
TAS:M,L,H.D,B where:
M - mode (E/D)
L - low settings (°C)
H - high settings (°C)
D - Action delay (sec)
B - Latch mode (0 to 3)
TAB: where:
Value = 0 to 3
01:D or 02:D
01:FL or 02:FL
01:FH or 02:FH
01:FR or 02:FR
01:MT or 02:MT
01:PT or 02:PT
01:TL or 02:TL
01:TH or 02:TH
01:TR or 02:TR
01:DE or 02:DE
01:MC or 02:MC
0x:D
MTZ
MTF:
MTL:
MT:D
MT:E
MTR:
(in current EU)
MTS: Mode, Start, Limit
Page 19