turck BL20 Series - Page 442

Technology Modules
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440
Activate and deactivate PLC configuration check
During the PLC configuration check, the configuration stored in the BL20-E-1SWIRE is compared
with the SET configuration stored in the PLC. The complete device ID must match. If the two config-
urations match completely, the entire SWIRE bus is ready for data exchange (RDY LED lit). If the two
configurations do not match, the system responds according to other parameter settings (see Sys-
tem behavior with negative configuration checks and slave failure, s. S. 440).
PLC configuration check active (default setting)
Parameter „configuration“ = 0 (see Module parameters (page 451))
PLC configuration check inactive
Parameter „configuration“ = 1 (see Module parameters (page 451))
System behavior with positive configuration checks
1 The physical structure of the SWIRE bus is scanned on power up and compared with the configura-
tion stored in the BL20-E-1SWIRE.
– The SWIRE bus starts operation (SW LED lit) if the physical structure of the SWIRE bus matches
the SWIRE configuration stored in the BL20-E-1SWIRE.
2 If the PLC configuration check is activated, the configuration stored in the BL20-E-1SWIRE is com-
pared with the SET configuration stored in the PLC. The complete device ID must match.
– If the two configurations match completely, the entire SWIRE bus is ready for data exchange
(RDY LED lit).
3 The system then starts data exchange.
4 The physical structure of the SWIRE bus is monitored continuously during operation so that any
changes on the bus or slave failures can be detected.
System behavior with negative configuration checks and slave failure
The system behavior when the result of a configuration check is negative, depends on the individual
parameter settings
The following occurs if the physical structure of the SWIRE bus is found not to match the configura-
tion stored in the BL20-E-1SWIRE on power up (SW LED flashing):
 If the ”Moeller Conformance” function is deactivated, the physical structure is continuously com-
pared with the configuration stored in the BL20-E-1SWIRE. The SWIRE bus starts operation as
soon as the matching configurations are detected:
– After the physical structure was stored in the BL20-E-1SWIRE:
- Automatically (if the automatic SWIRE configuration is activated)
Æ
ATTENTION
SWIRE bus energized
Destruction of the device
† De-energize the SWIRE bus before carrying out any changes.
NOTE
The following functions are deactivated if the ”Moeller Conformance” function is active:
–
Automatic SWIRE configuration
– Bus oriented configuration check
– Slave oriented configuration check