BRONKHORST®
Page 34
EL-FLOW
Base
Series Mass Flow Controllers
9.17.061
Kopen (Open from zero c. resp.)
Type
Access
Range
FlowDDE
FlowBus
ModBus PDU
Unsigned char
RW
0…255
165
114/18
0x0E52/3667
Controller response when starting-up from 0% (when valve opens).
Value 128 is default and means: no correction.
Otherwise controller speed will be adjusted as follows:
05
.
1
)
0
128
(
_
_
respopen
old
response
new
response
Knormal (Normal step c. resp.)
Type
Access
Range
FlowDDE
FlowBus
ModBus PDU
Unsigned char
RW
0…255
72
114/5
0x0E45/3654
Controller response during normal control (at setpoint step)
Value 128 is default and means: no correction.
Otherwise controller speed will be adjusted as follows:
05
.
1
)
128
(
_
_
contresp
old
response
new
response
Kstable (Stable situation c. resp.)
Type
Access
Range
FlowDDE
FlowBus
ModBus PDU
Unsigned char
RW
0…255
141
114/17
0x0E51/3666
Controller response when controller is stable (within band of 2% of setpoint)
Value 128 is default and means: no correction.
Otherwise controller speed will be adjusted as follows:
05
.
1
)
128
(
_
_
respstable
old
response
new
response
4.1.6 Changing Default Control Mode
Instruments are delivered with either analog or digital signal as default setpoint, depending on
customer’s requirement.
After every (power on) reset the instrument will return to its default control mode.
The default control mode can be changed with the following parameter:
IOStatus
Type
Access
Range
FlowDDE
FlowBus
ModBus PDU
Unsigned char
RW
0…255
86
114/11
0xF258/62041
Bit 6 [7..0] represents the former analog jumper.
1 = default control mode is analog
0 = default control mode is digital
Procedure for changing default digital operation to default analog operation:
Read IOStatus
Add 64 to the read value
])
40
0
[
(
x
OR
Write IOstatus
Procedure for changing default analog operation to default digital operation:
Read IOStatus
Subtract 64 from the read value
])
40
0
[
(
x
AND
