BEKA BA627E, Instruction Manual, Page: 13 / 16

5.8 Maximum output rate of change: ‘rAtE’
To minimise plant disturbance when the Set Point
Station output current is adjusted, the maximum rate
of change is defined by this function. The maximum
rate is adjustable between approximately 1 and 100
seconds for full scale output travel from 4 to 20mA.
If 0 seconds is selected the function is disabled.
To define the maximum rate of change of the Set
Point Station output select 'rAtE' from the
configuration menu and press
P which will reveal the
present maximum rate of change in seconds with
one digit flashing. The flashing digit may be
adjusted by pressing the ▲ or ▼ buttons, when the
flashing digit is correct pressing
P will transfer
control to the next digit. When all the digits have
been adjusted, press
E to enter the new value and
return to the configuration menu.
When the output rate of change limitation is
functioning, in the operating mode the Set Point
Station digital display will show the requested output
and will flash until the requested output current is
achieved. The bargraph display always shows the
Set Point Station’s actual output.
Pressing the E button while the output is ramping to
a new requested value will stop the output changing.
5.9 Function of the P push-button in operating
mode: ‘P.Fn’
Using this function the Set Point Station may be
configured to display the output current in milliamps,
the output current as a percentage of the output
range, or to provide access to the five pre-set
outputs when the
P button is pressed in the
operating mode.
To check or change the function of the P push
button select 'P.Fn' from the configuration menu and
press
P to reveal the present setting. Pressing the
▲ or ▼ button will scroll the setting between:
'PC' Output as a percentage of output
range.
'4-20' Output current in milliamps
‘P5Et’ Access to the five pre-set outputs
see 6.7
When set as required, press E to return to the ‘P.Fn’
prompt in the configuration menu.
5.10 Encoder: ‘EnC’
For applications requiring the Set Point Station’s
4/20mA output current to be controlled by a rotary
knob, an external three wire quadrature encoder
may be directly connected to terminals 5, 6 and 7.
The BEKA BA490 Is a panel mounting encoder that
generates 12 contact pulses per revolution and is
intended for use with the BA627E. Other encoders
that produce a different number of contact pulses
per revolution may also be used. So that all external
encoders have a similar adjustment resolution, the
‘EnC’ function enables the number of pulses
between 6 and 48 per revolution to be defined.
To enter the number of pulses per revolution that the
external encoder generates, select 'EnC' from the
configuration menu and press
P which will reveal the
existing setting with one digit flashing. The flashing
digit may be adjusted by pressing the ▲ or ▼
button, when the flashing digit is correct pressing
P
will transfer control to the other digit. When both
digits have been adjusted press
E t o return to the
‘EnC’ prompt in the configuration menu.
Section 7.4 contains information about the use of an
external rotary encoder.
5.11 Security code: ‘CodE’
Access to the instrument configuration menu may be
protected by a four digit security code which must be
entered to gain access. New instruments are
configured with the default security code 0000 which
allows unrestricted access to all configuration
functions.
To enter a new security code select 'CodE' from the
configuration menu and press
P which will cause the
Set Point Station to display the existing security
code with one digit flashing. The flashing digit can
be adjusted using the ▲ and
▼ push buttons, when
set as required operating the P button will transfer
control to the next digit. When all the digits have
been adjusted press
E to return to the ‘CodE’
prompt. The revised security code will be activated
when the Set Point Station is returned to the
operating mode. Please contact BEKA associates
sales department if the security code is lost.
5.12 Reset to factory defaults: ‘rSEt’
This function quickly returns to the BA627E Set
Point Station to the factory default configurations
shown in section 5.
To reset the Set Point Station select ‘rSEt’ from the
configuration menu and press
P. To prevent
accidental resetting the request must be confirmed
by entering ‘5urE’. Using the ▲ button set the first
flashing digit to ‘5’ and press
P to transfer control to
the second digit, which should be set to ‘u’. When
‘5urE’ has been entered pressing the
E button will
reset the configuration menus and return the display
to the ‘rSEt’ function in the configuration menu.
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