Bronkhorst®
Instruction Manual ES-FLOW™ 1xxC
9.17.153A
17
5.4.2
Default valve state
When the instrument is not powered or cannot communicate with the fieldbus network (if applicable), the control valve
automatically returns to its default state, which is closed for 'normally closed' valves (n/c) and fully open for 'normally open'
valves (n/o). Taking into account the typical process conditions under which the instrument is used (such as the processed
media and ambient conditions; see also
), the default state is generally considered safe.
5.5
Hardware controls
On top of the housing the instrument is equipped with a multifunctional switch (fn) and three
indication LEDs:
Status
Communication interface status
Mode/MOD
Operational mode
Error/NET
Error/warning indication
·
During normal operation the
Mode/MOD
indicator is lit green
l
continuously, while the
Error/NET
indicator flashes red
l
when data is being transferred.
·
During initialization and special procedures, the
Mode/MOD
indicator blinks or flashes.
·
See the
for general error indications and possible causes.
·
Several other indications are specific to the installed communication interface.
·
The
Status
LED is functional only if the instrument is equipped with an Ethernet based fieldbus interface.
·
Consult the according
for a list of all indications.
5.5.1
Multifunctional switch
Some special instrument functions can be started manually using the multifunctional switch near the indication LEDs. These
functions are available in analog as well as in digital operation mode.
5.5.1.1
Normal operating functions
·
In order to access these functions, press and hold the switch while the instrument is in normal operation mode (green
LED lit continuously).
·
As long as the switch is held, the LEDs show a repeating sequence of patterns, where each pattern indicates a function.
·
All patterns in this sequence are continuous.
·
Each pattern is shown for a number of seconds; in the table below, the column labeled
Hold time
indicates the time frame
within the sequence during which a pattern is shown.
·
To start a function, release the switch when the LEDs show the pattern of the required function.
l
(green)
l
(red)
Hold time Function
off
off
0…1 sec
No action
off
off
1…4 sec
1. In case of a min/max alarm: reset alarm
2. FLOW-BUS: Auto-install to bus - lets instrument obtain free node address if
configured node address is occupied
Note: min/max alarm (if any) has to be reset before auto install can be performed.
off
on
4…8 sec
Reset instrument; clear all warnings and error messages and restart the instrument
on
off
8…12 sec Auto-zero; re-adjust the zero-point of the instrument (flow meters/controllers only)
on
on
12…16 sec Enable FLASH mode for firmware update:
·
the instrument shuts down and both LEDs are switched off
·
at the next power-up, the instrument will be active again
·
See
for background information and instructions on how to adjust the zero point of an instrument.
·
Do not perform a zeroing procedure before having taken notice of the instructions.
