Yokogawa YVP110 - Manual (Page 51)

<9. Configuration>
9-1
IM 21B04C01-01E
9. Configuration
This chapter contains information on how to adapt
the function and performance of the YVP110 to suit
specific applications. Because two or more devices
are connected to Fieldbus, settings including 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 tag and node addresses for all
devices.
(3) Definition of combining function blocks
Determines the method for combination
between 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
parameters 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. For operation of the
host, refer to the instruction manual for each host.
No details of the host are explained in the rest of
this material.
IMPORTANT
Connecting a Fieldbus configuration tool
to a loop with its existing host may cause
communication data scrambles resulting in a
functional disorder or a system failure.
IMPORTANT
Do not turn off the power immediately after
setting. If the power is turned off within 40
seconds after setting is made, the modified
parameters are not saved and the settings return
to the original values.
9.1 Network Design
Select the devices to be connected to the Fieldbus
network. (Refer to 8.4 'System Configuration' for
selection of the devices.)
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. The maximum
current consumed (power supply voltage 9 V to 32
V) for YVP110 is 17 mA. The cable must have the
spur in a minimum length with terminators installed
at both ends of the trunk.
9.2 Network Definition
Before connection of devices with Fieldbus, define
the Fieldbus network. Allocate PD Tag and node
addresses to all devices (excluding such passive
devices as terminators).
The PD Tag is the same as the conventional
one used for the device. Up to 32 alphanumeric
characters may be used for definition. Use a
hyphen as a delimiter as required.
The node address is used to specify devices for
communication purposes. Because data is too
long for a PD Tag, the host uses the node address
in place of the PD Tag for communication. A range
of 20 to 247 (or hexadecimal 0x14 to 0xF7) can
be set. Generally, the device (LM device) with bus
control function (Link Master function) is allocated
from a smaller address number (20) side, and other
devices (BASIC device) without bus control function
allocated from a larger address number (247) side
respectively.