Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 23)

<5. CONFIGURATION>
5-4
IM 11M12D01-61E
5.3 Function Block Link Definitions
The output of one function block may be linked to the input of another.
For the AV550G, the three AI blocks each have (OUT) output parameters, the two DI blocks have
(OUT_D) output parameters -- these may be connected to the inputs of control blocks -- and there are
also MAI and MAO blocks. The procedure for writing values to the link object settings of the AV550G
are described in Sec. 5.6 Block Settings. As an alternative to connecting the outputs of the AV550G
block to other blocks, you can have the host read them at suitable intervals.
For connections between blocks to work as expected, you will have to schedule the starting of each
block execution cycle and the timing of communications, allowing for execution time of each block.
Refer to Table 5.3 for the factory default execution start timings (in brackets) for the AI blocks in the
AV550G.
Table 5.3 Function Block execution scheduling for AV550G
Each AI block takes a maximum of 29 ms to execute, so you can schedule communication of the
output value to the input of a connected function block to start after this time has elapsed.
Figure 5.2 illustrates the connection of typical function blocks, and Figure 5.3 shows the
corresponding scheduling of their execution.
Figure 5.2 Example of loop with two AV550G function blocks connected to other instruments.
T0503.ai
Index Parameters
269
(SM)
MACROCYCLE_DURATION Macrocycle is control or measurement cycle repetition interval,
unit 1/32 ms, (default 32,000=1 sec).
276
(SM)
FB_START_ENTRY.1 Macrocycle-relative start offset of AI1 block, unit 1/32 ms,
(default 0=0 ms).
277
(SM)
FB_START_ENTRY.2 Macrocycle-relative start offset of AI2, unit 1/32 ms,
(default 9600=300 ms).
279 (SM)
to
289 (SM)
FB_START_ENTRY.4 to 14
Setting (& factory default)
Macrocycle-relative start offset of AI3, unit 1/32 ms,
(default 19200=600 ms).
278
(SM)
FB_START_ENTRY.3
Not set
F0502.ai
FIC100
FIC200
FC100
FI200
AV550G
FI100
AV550G