rotork CK Series User Manual

Profibus Installation Manual
32
5.2.2 Digital Inputs Reporting the Profibus
Card Condition
GSD Parameterisation Permitted
If the actuator and card is being parameterised using
either the FDT, PDM programmes and the associated
device description files, or using the Setting Tool, then
the ability to alter the card parameters by the GSD may
need to be removed. The status of this bit shows if,
during parameterisation after connection or power up,
the settings in the GSD file will be used or the existing
settings will be retained. When the bit is true (1), GSD
parameterisation is permitted.
On start-up of the card following connection
to the bus the PLC will conduct a sequence of
events including setting the Configuration of
the card and then adjusting the card Parameters.
The configuration will be the one selected for
this particular card when it was commissioned
onto the Profibus highway (see section 5.4). The
parameterisation will be in accordance with
the values in the GSD file associated with the
specific actuator. It is possible to set the card so
that GSD parameterisation is ignored; this then
allows the actuator to be powered off and on
again without resetting any parameter values.
Control Contention
If an incorrect value is transmitted in the ACTCON register
then there will be no control action and this bit will be true
(1) until a valid ACTCON value is received. Only one bit may
be set in the ACTCON register at a time.
Partial Stroke in Progress
When the actuator is performing a partial stroke this bit is
true (1). Once the action is complete the bit is reset (0). If
the partial stroke is interrupted by a new command then
the bit will be reset
Part Stroke Error In order to perform a partial stroke of
the valve, the starting position is specified as either the
open limit or the close limit. If the actuator is commanded
to perform a partial stroke when it is not in the correct
starting position or when it is in a mid-position this error is
generated and the bit will be set (1).
There is a timer associated with Partial Stroke that is
set during parameterisation to a value long enough to
cover a successful partial stroke operation from end to
mid position and back to the end. If the actuator fails to
complete the partial stroke within the time set then this bit
will be true (1).
Once set, the Part Stroke Error bit will be reset to 0 when
the actuator next moves at least 2% by either a manual or
automatic operation.
Backup or Primary Channel
This bit is used to indicate if the Profibus communication
is to a channel on the card that is able to move the valve
(Primary) or to a channel that is prevented from operating
the valve (Backup).
When the communication is to the Primary Profibus DP
channel the bit will be off (0).
With a single channel card this bit will always
indicate ‘Primary’ and be (0).
With a dual card set to FR mode there is only one
highway and the card uses two addresses, one
per channel. If the communication is directed to
the address for the backup channel this bit will
be set to 1; if it is to the address for the primary
channel it will be set to 0.
With a dual card set to SR mode only one
address is used, but there are two highways.
If the communication is direct on the highway
connected to the backup channel of the card
then the bit will be set to 1; if the highway is
connected to the primary channel the bit will be
set to 0.
Valve control can only be achieved if this bit
reports as a (0).
1 or 2 Channels Available
This bit indicates the condition of the second channel on
a dual channel card. It will be true (1) if both channels are
available and working on the card. It does not indicate
the status of the connection or highway to the second
channel.
On a single channel card it will always report (0).
If there is a fault on the second channel of a dual channel
card it will report (0), indicating that the second channel is
not working correctly.
SR or FR Mode
This bit indicates the addressing mode chosen for the card.
When reporting as (0) the bit indicates that one address is
being used. On a single channel card only one address
is permitted.
On a dual channel card a single address is used when
two Profibus DP highways are used and the System
Redundancy is employed.
If the bit reports as (1) then the card must be dual channel
and the redundancy is using two addresses for Flying
Redundancy configuration.
The Actuator Cyclic Data Signals
A4US
US
A4
US A4
US
A4

rotork CK Series Specifications

General

Brand	rotork
Model	CK Series
Category	Controller
Language	English