Yokogawa RotaMASS 3-Series - Manual (Page 25)

5. CONFIGUrATION
5-1
IM 01R04B05-00E-E 3rd edition July 30 2010 -00 all Rights Reserved. Copyright © 2005, Rota Yokogawa
5. CONFIGUrATION
this chapter contains information on how to adapt
the function and performance of the RotaMaSS
to suit specific applications. Because two or more
devices are connected to Fieldbus, settings in-
cluding the requirements of all devices need to be
determined. Practically, the following steps must
be taken.
(1) Network design
Determines the devices to be connected to
Fieldbus and checks the capacity of the power
supply.
(2) Network definition
Determines the PD tag and node addresses
for all devices.
(3) definition of combining function blocks
Determines the method for combination be-
tween each function block.
(4) Setting tags and addresses
Sets the PD tag and node addresses one by
one for each device.
(5) Communication setting
Sets the link between communication param-
eters and function blocks.
(6) Block setting
Sets the parameters for function blocks.
the following section describes each step of the
procedure in the order given. using a dedicated
configuration tool allows the procedure to be
significantly simplified. this section describes the
procedure to be assigned for a host which has
relatively simple functions. Refer to appendix
6 when the RotaMaSS is used as Link Master
(option).
5.1 Network design
Select the devices to be connected to the Field-
bus network. the following instruments are neces-
sary for operation of Fieldbus.
• Power supply
Fieldbus requires a dedicated power supply. It
is recommended that current capacity be well
over the total value of the maximum current
consumed by all devices (including the host).
Conventional DC current cannot be used as
power supply.
• Terminator
Fieldbus requires two terminators. Refer to the
supplier for details of terminators that are at-
tached to the host.
• Field devices
Connect the field devices necessary for instru-
mentation. the RotaMaSS has passed the
interoperability test conducted by the Fieldbus
Foundation. In order to properly start Fieldbus,
it is recommended that the devices used sat-
isfy the requirements of the above test.
• Host
used for accessing field devices. a minimum
of one device with bus control function is
needed.
• Cable
used for connecting devices. Refer to Fieldbus
technical Information (tI 38K3a01-01E) for
details of instrumentation cabling. Provide a
cable sufficiently long to connect all devices.
For field branch cabling, use terminal boards
or a connection box as required.
First, check the capacity of the power supply.
the power supply capacity must be greater than
the sum of the maximum current consumed by
all devices to be connected to Fieldbus. For the
RotaMaSS, the maximum current (power supply
voltage: 9 to 32 VDC) is 15 ma. the cable must
have the spur in a minimum length with termina-
tors installed at both ends of the trunk.
5.2 Network definition
Before connection of devices with Fieldbus, define
the Fieldbus network. allocate PD tags and node
addresses to all devices (excluding such passive
devices as terminators).
PD tags are the same as conventional tag num-
bers assigned to devices. up to 32 alphanumeric
characters may be used for definition of the PD
tag for each device. use hyphens as delimiters
as required.