Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 24)

<5. CONFIGURATION>
5-5
IM 11M12D01-61E
Figure 5.3 Function Block and Communications Scheduling Example.
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”,
(refer to Sec. A6.1).
- Interval between “end of block execution” and “start of next block execution”.
5.4 Setting of Tags and Addresses
This section explains the procedure for setting AV550G PD tags and node addresses. As shown in
Fig. 5.4, Fieldbus devices may be in any of three states, but only in SM_OPERATIONAL state (at the
bottom) can the function block be executed. If you are changing the PD tags and/or node address of
an AV550G, be sure to revert it to this state.
Fig. 5.4 PD-tag and Node-Address related State Transition diagram (figure reference)
Unless specified otherwise at order time, factory default settings for the AV550G are for PD tag setting
of “AV550G” and node address of F7 hex (247). To change just the node address setting, you can
clear the existing node address then set a new one; but to change the PD tag then you need to clear
the node address and PD tag the set the new PD tag and the node address.
A device whose node address has been cleared will select an arbitrary address in the range F8 to
FB (248 to 251). To address such a device, you should specify the device ID. For the AV550G, this is
5945430401xxxxxx (six alphanumeric digits after the 5945430401).
FI103 FI100
FC100 FIC100
FC200 FIC200 FC100
FI200 FI200
Function
Block
Schedule
Commu-
nication
Schedule
OUT
IN
OUT
CAS_IN
BKCAL_OUT
BKCAL_IN
BKCAL_IN
BKCAL_OUT
IN
Scheduled
Communication
F0503.ai
Macrocycle (Control Period)
Communications
need not be scheduled
UNINITIALIZED
(Neither tag nor address is set)
Tag clear Tag setting
INITIALIZED
(Only tag is set)
SM_OPERATIONAL
(Tag and address are defined, so
the function block can be executed.)
Address clear
F0504.ai
Address setting