Parker X-Flow FM-1407, Инструкции по эксплуатации

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Page 31 Instruction manual Parker X-Flow FM-1407 Rev - 11/2021
Knormal (ContrResp)
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 (RespStable)
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
•
Write IOStatus
4.1.7 Display Filter
The output signal of an X-Flow™ instrument (measured value) is filtered. The filter has dynamic
behaviour: when a change in sensor signal is detected, the measured value will be less filtered than
when the sensor signal is constant and stable.
There are two filter constants: Static Display Factor and Dynamic Display Factor.
These two factors can be transformed into time constants using the following formula:
factor
factor
cycletime
−
⋅ =
1
τ