Setting Parameters
73 of 132
Publication S177E V2.0 Issue 03/05
9
SETTING PARAMETERS
IMPORTANT SAFETY PRECAUTIONS
If it is not possible to secure the connected equipment into a safe state then disconnecting
the loop cable from both ports of the master station will prevent plant operation.
When setting the parameters for a particular master station it is essential to protect any
connected plant from inadvertent operation. Ensure that the connected actuators are in Local
control (as this will prevent them from moving under Pakscan control EXCEPT for ESD -
remember that ESD is latched in a field unit), or Local Stop is selected, or locked in 'Hand'.
Also ensure that any other plant equipment connected to field units is either able to be
operated safely, or is prevented from operating.
On the master station ensure that the ESD option is either disabled or that the input is a
closed circuit (by either a link or the actual input contact).
These simple precautions will make sure that if a mistake is made in the setting of the
master station parameters no plant action will result.
The plant should only be returned to an operational state once it is certain that the
parameters are correctly set or the programme operates correctly.
BEFORE COMMENCING
Make sure that all the hardware selections match those required for the final equipment. Set
all the jumper links and switches as required.
Make sure the master station is powered up and the screen is illuminated.
Changes to the internal parameter settings can only be made if the PIN is known or disabled
or the Access level is low enough. (When the master station leaves Rotork its PIN protection
level is disabled, however, it may have been enabled by a third party before arriving on site).
Make sure that access is possible by knowing the PIN or knowing what PIN is to be set.
9.1 Initial
Decisions
The setting up of the user variable parameters in a master station requires detailed knowledge of what
the system is required to do and how it is to achieve it.
Answers to the following questions must be available:
2-wire
loop
For the 2-wire loop, how many field units are connected, or to be connected, and what is the
highest address used for a field unit? What is the loop baud rate? Is it necessary to run the loop
at its maximum performance?
