Bronkhorst®
Instruction Manual ES-FLOW™
9.17.145E
43
The control characteristics are optimized during production. These parameters should only be changed if absolutely
necessary, and only by or under the supervision of trained service personnel.
Controller Speed
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0.2…5
254
114/30
0xF2F0…0xF2F1/62193…62194
This parameter sets the overall controller speed factor for the selected fluid set.
Controller speed
is set ex factory between
value '0.5' (slow) and '2' (fast). The default value is '1'.
PID-Kp
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…1E+10
167
114/21
0xF2A8…0xF2A9/62121…62122
PID controller proportional action, multiplication factor.
PID-Ti
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…1E+10
168
114/22
0xF2B0…0xF2B1/62129…62130
PID controller integral action in seconds.
PID-Td
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…1E+10
169
114/23
0xF2B8…0xF2B9/62137…62138
PID controller derivative action in seconds. The default value is 0.0.
Open From Zero Response
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
165
114/18
0x0E52/3667
Response factor, applied to proportional action when opening the valve from 0%.
·
Default value: 128 (no correction)
·
Other values adjust the controller gain (correction signal) as follows: Controller gain =
Controller Speed
*
PID-Kp
*
1.05
(response factor - 128)
Normal Step Response
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
72
114/5
0x0E45/3654
Response factor, applied to proportional action during normal control (at setpoint step).
·
Default value: 128 (no correction)
·
Other values adjust the controller gain (correction signal) as follows: Controller gain =
Controller Speed
*
PID-Kp
*
1.05
(response factor - 128)
Stable Situation Response
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
141
114/17
0x0E51/3666
Stable situation response, applied when the controller is stable (within a 2% band around the setpoint).
·
Default value: 128 (no correction)
·
Other values adjust the controller gain (correction signal) as follows: Controller gain =
Controller Speed
*
PID-Kp
*
1.05
(response factor - 128)