Host Setting; Power-On Of Digitalyewflo And Bus - YOKOGAWA digitalYEWFLO Series User Manual

4.2

Host Setting

To activate Fieldbus, the following settings are
required for the host.
IMPORTANT
Do not turn off the power immediately after
setting. When the parameters are saved to the
EEPROM, the redundant processing is executed
for the improvement of reliability. If the power
is turned off within 60 seconds after setting is
made, the modified parameters are not saved
and the settings may return to the original values.
Table 4.2 Operation Parameters
Symbol Parameter
V (ST) Slot-Time
V (MID) Minimum-Inter-
PDU-Delay
V (MRD) Maximum-Reply-
Delay
V (FUN) First-Unpolled-Node Indicate the address next
V (NUN) Number-of-
consecutive-
Unpolled-Node
Description and Settings
Indicates the time necessary
for immediate reply of
the device. Unit of time
is in octets (256 μs). Set
maximum specification
for all devices. For
digitalYEWFLO, set a value
of 4 or greater.
Minimum value of
communication data
intervals. Unit of time is in
octets (256 μs). Set the
maximum specification
for all devices. For
digitalYEWFLO, set a value
of 4 or greater.
The worst case time
elapsed until a reply is
recorded. The unit is
Slot-time; set the value so
that V (MRD) x V (ST) is
the maximum value of the
specification for all devices.
For digitalYEWFLO, the
setting must be a value of 12
or greater.
to the address range used
by the host. Set 0x15 or
greater.
Unused address range.
<4. GETTING STARTED>
0x00
0x0F
0x10
0x13
0x14
V(FUN)
V(FUN)+V(NUN)
0xF7
0xF8
Default address
0xFB
0xFC
Portable device address
0xFF
Note 1: LM device: with bus control function (Link Master function)
Note 2: BASIC device: without bus control function
Figure 4.2 Available Address Range
4.3 Power-on of digitalYEWFLO
and Bus
Turn on the power to the host, bus, and
digitalYEWFLO. If any segments do not light, or if
a current anomaly occurs, check the voltage of the
power supply for the digitalYEWFLO.
The device information, including PD tag, Node
address, and Device ID, is described on the sheet
attached to digitalYEWFLO. The device information
is given in duplicate on this sheet.
Using the host device display function, check that
the digitalYEWFLO is in operation on the bus.
DEVICE INFORMATION
Device ID:5945430009XXXXXXXX
PD Tag:XXXXXX
Device Revision:X
Node Address:0xXX
Serial No.:XXXXXXXXXXXXXXXXX
Physical Location:
Note:
Our Device Description Files and Capabilities Files available at
http://www.yokogawa.com/fld/ (English)
http://www.yokogawa.co.jp/fld/ (Japanese)
DEVICE INFORMATION
Device ID:5945430009XXXXXXXX
PD XXXXXX
Device Revision:X
Node Address:0xXX
Serial No.:XXXXXXXXXXXXXXXXX
Physical Location:
Note:
Our Device Description Files and Capabilities Files available at
http://www.yokogawa.com/fld/ (English)
http://www.yokogawa.co.jp/fld/ (Japanese)
Figure 4.3 Device Information Sheet Attached to
digitalYEWFLO
4-2
Not used
Bridge device
LM device
Unused V(NUN)
BASIC device
F0402.ai
F0403.ai
IM 01F06F00-01EN