BRONKHORST EL-PRESS Metal sealed, Instruction Manual

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Bronkhorst®
Instruction Manual EL-PRESS™ 9.17.101I 32
Value Mode Instrument action Setpoint source
7 Setpoint 100% Controlling, setpoint fixed to 100%
8 Valve Fully Open Controller disabled, valve fully opened
9 Calibration Mode Calibration mode enabled
(factory only)
10 Analog Slave Acting as slave of other instrument in analog mode Analog Input x Slave
Factor/ 100%
12 Setpoint 0% Controlling, setpoint fixed to 0%
13 FLOW-BUS
Analog Slave
Acting as slave of other instrument on FLOW-BUS, slave
factor is set by analog input signal
RS-485 only: FLOW-BUS
master output x Analog Input
18 RS232 Controlling, safe state deactivated Fieldbus/RS-232
20 Valve Steering Controller disabled, setpoint redirected to Valve output
21 Analog Valve
Steering
Controller disabled, analog input redirected to Valve output
22 Valve Safe State Force instrument in safe state
Immediately after power-up, Control Mode is set to 'Analog input’ or ‘BUS/RS232’ automatically, depending on the (requested)
default setting for analog or digital operation. If Control mode is set to value 0, 1, 9 or 18, the instrument returns to its
default control mode at the next power-up or reset. Other values are retained after power-up or reset.
4.1.1 Default control mode
IO Status
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned char RW

0…255 86 114/11 0x0E4B/3660
The instrument is set to accept a setpoint from either an analog or a digital source. Although this setting can be changed
with parameter Control Mode , the instrument usually returns to its default control mode at every power-up or reset. The
default control mode can be set with parameter IO Status ; to change it, use the procedures as described below.
Changing from digital operation to analog operation:
1. Set parameter Init Reset to 64 (unlocked)
2. Read parameter IO Status
3. Add 64 to the read value
4. Write the new value to parameter IO Status
5. Set parameter Init Reset to 82 (locked)
Changing from analog operation to digital operation:
1. Set parameter Init Reset to 64 (unlocked)
2. Read parameter IO Status
3. Subtract 64 from the read value
4. Write the new value to parameter IO Status
5. Set parameter Init Reset to 82 (locked)
The procedures described above do not change the value of parameter Control Mode directly. To apply the new default
control mode immediately, change the value of parameter Control Mode manually or reset or restart the instrument.
4.2 Measurement and control
Measure
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned int R 0…41942 8 1/0 0x0020/33
This parameter indicates the flow metered by the instrument. The value of 32000 corresponds to 100%, the maximum
measured value output is 131.07%, which translates to 41942.