Bronkhorst®
Instruction Manual ES-FLOW™ 1xxC
9.17.153A
20
Changing network settings
·
By briefly pressing the switch 5 times with intervals of up to 1 second in normal operation mode, the instrument enters a
state in which the node address and baud rate can be changed (non-Ethernet based protocols only; for Ethernet based
protocols, network parameters are configured by the fieldbus master and cannot be set on the instrument).
·
Changing network parameters with the multifunctional switch is done in 3 steps, each represented by a LED indication
pattern (see table below).
·
At the start of each step, the according LED(s) start(s) flashing fast (0.1 second on, 0.1 second off). By pressing and holding
the switch, the associated action is started and the flashing slows (05. seconds on, 0.5 seconds off).
Step Pattern
Maximum
flash
count
Action
1.
Green
l
l
12
set tens of node address
2.
Red
l
l
9
set units of node address
3.
Green and red
(simultaneous)
l
l
10*
set baud rate index (number of flashes)
*) maximum count depends on the supported baud rates of the fieldbus. See the baud rate table above for supported baud
rates and associated indexes.
To execute a step, follow these instructions:
·
Press and hold the switch (flashing slows)
·
To select value 0 (zero), release the switch within 1 second, otherwise:
·
Count the number of LED flashes
·
Release the switch as soon as the required value is reached
·
In case you lose count, keep the switch pressed and wait until the flash count reaches its maximum and restarts
On completion of a step, the instrument automatically advances to the next step. When all required steps have been
completed, the instrument returns to its normal operation mode.
If the switch is not pressed within 60 seconds after starting a step, all changes in the previous steps are cancelled and the
instrument returns to its normal operation mode.
5.5.1.4
Disabling multifunctional switch
To prevent unwanted use of the multifunctional switch, it can be disabled through the digital interface using the following
procedure:
1. Set parameter
Init reset
to 64
2. Read parameter
IO status
3. Subtract 8 from the read value
4. Write the new value to parameter
IO status
5. Set parameter
Init reset
to 82
To re-enable the switch, add 8 to the value of
IO status
in step 3.
5.6
Adjusting zero point
Zero-stability
The zero point of a Bronkhorst® flow meter/controller (the measurement signal that indicates the absence of a flow) is
factory adjusted with water, at approximately 20 °C and atmospheric pressure (ambient conditions), with the instrument
positioned upright. Under normal circumstances, the zero point will remain stable. However, in rare cases (for example due
to strong fluctuations in temperature and/or pressure), the instrument might develop a zero-stability error over time,
causing it to detect a flow when actually there is none. The zero-stability error can be neutralized by re-adjusting the zero
point.
If the instrument still detects a (steady) flow while all valves are closed and the fluid system is leak tight, re-adjusting the
zero point is recommended.
