Setting Of Tags And Addresses - YOKOGAWA digitalYEWFLO Series User Manual

Table 5.3 Function Block Execution Schedule of
the digitalYEWFLO
Index Parameters
269 (SM) MACROCYCLE_
DURATION
276 (SM) FB_START_ENTRY.1
277 (SM) FB_START_ENTRY.2
278 (SM) FB_START_ENTRY.3 to
to FB_START_ENTRY.14
289 (SM)
A maximum of 29 ms is taken for execution of each
AI block. Arrange the communication schedule
for an AI block's data that is to be transferred to its
downstream block in such a way that it starts after a
lapse of longer than 30 ms.
Figure 5.3 shows typical function block and
communication schedules for the loop shown in
Figure 5.2.
FIC100
digitalYEWFLO
#1
FI100
digitalYEWFLO
#2
FI200
Figure 5.2 Example of Loop Connecting Function
Blocks of Two digitalYEWFLOs with
Other Devices
Setting (Factory Setting
in Parentheses)
Repetition period of control
or measurement, i.e.,
macrocycle; to be set as a
multiple of 1/32 ms (32000
= 1 second)
Start time of the AI1
block represented as the
elapsed time from the start
of each macrocycle; to be
set as a multiple of 1/32 ms
(0 = 0 ms)
Start time of the PID block
(optional) represented as
the elapsed time from the
start of each macrocycle;
to be set as a multiple of
1/32 ms (9600 = 300 ms)
Not set.
FIC200
FC100
F0502.ai
<5. CONFIGURATION>
Macrocycle (Control Period)
FI103
FI100
IN
OUT
FIC100
FC100
BKCAL_IN
FC200
FI200 FI200
OUT
Function
Block
Schedule
Commu-
nication
Schedule
Figure 5.3 Function Block Schedule and
Communication Schedule
When the control period (macrocycle) is set to more
than 4 seconds, set the following interval to be more
than 1% of the control period.
- Interval between "end of block execution"
and "start of sending CD from LAS"
- Interval between "end of block execution"
and "start of the next block execution"
5.4

Setting of Tags and Addresses

This section describes the steps in the procedure
to set the PD tags and node address in the
digitalYEWFLO. There are three states of Fieldbus
devices as shown in Figure 5.4, and if the state
is other than the lowest SM_OPERATIONAL
state, no function block is executed. Whenever
you have changed the PD tag or address of
a digitalYEWFLO, transfer its state to SM_
OPERATIONAL.
UNINITIALIZED
(No tag nor address is set)
Tag clear
INITIALIZED
(Only tag is set)
Address clear Address setting
SM_OPERATIONAL
(Tag and address are retained, and
the function block can be executed.)
Figure 5.4 Status Transition by Setting PD Tag and
Node Address
5-3
CAS_IN
BKCAL_OUT
FIC200 FC100
IN
BKCAL_IN BKCAL_OUT
Unscheduled
Communication
Scheduled
Communication
F0503.ai
Tag setting
F0504.ai
IM 01F06F00-01EN