Proflags 2 setting determines the port
used for communication and whether
the host has the ability to change the
Profibus module address.
Using the
+
or
-
keys display the
required setting:
Set:
Port
Host address change
[01]
2
disabled
[03]
1
disabled
[06]
2
enabled
[12]
1
enabled
The default setting is
[12]
. On failure to
establish communication the setting
will cycle between
[12]
and
[06]
at 4
1
/
4
minute intervals until communication is
established.
Port 1, Host Enabled
PRESS THE
KEY.
The displayed option will flash
indicating that it has been set.
The power to the actuator must
now be cycled in order for the
Proflags 2 setting to take effect.
Press the
O
key to display
[PF]
.
48
Profibus Proflags 2
Pb
PF
Profibus Remote
Auxiliary Input
The IQT actuator has the facility to accept 4 auxiliary inputs (AUX1–AUX4). These
are used when supplementary remote control or digital auxiliary inputs are required
in addition to the standard control and feedback features incorporated into the
Profibus module. It is also possible to have a combination of both remote control
and volt-free inputs to provide, for example, open and close control as well as a
high and low tank level alarm indication, supplied via an external transducer.
The hexadecimal number displayed under PF can be considered as a ‘‘software
mask’’. It is this mask that tells the Profibus module what type of input to expect,
control or input signal, and what form the input will be, normally open or normally
closed
(refer to page 72 for Binary, Hexadecimal and Decimal Conversion Table)
.
To decipher the mask the number needs to be split into two separate hexadecimal
characters, each of which can be sub-divided into 4 binary bits. The first 4 bits
represent the function and the second 4 represent the input source (known as
invert). Pictorially this can be represented as:
Left side hex character
Right side hex character
Aux 4 to 1 (function)
AUX 4 to 1 (Invert)
Bits
4 3 2 1
4 3 2 1
When used for remote control of the actuator bits 4 to 1 of the function character
have been designated as follows:
Bit 4 (AUX4)
–
ESD
Bit 3 (AUX3)
–
Stop/Maintain
Bit 2 (AUX2)
–
Close
Bit 1 (AUX1)
–
Open
(When used for digital signal inputs they are simply designated as AUX 4 to AUX 1.)
