Omron CQM1-ARM21 Operation Manual page 43

Master Operation Modes
Protected Mode
Auto_Addressing
Configuration Mode
!
Caution
In some cases it may not be possible to change directly from one mode to
another:
•
Change from Configuration Mode to Protected Mode is not possible while
a slave with address 0 is detected on the network.
•
Change from Setup Mode to Protected Mode is not possible while the
Mode Bit is ON.
In both cases, when setting the MOD switch from OFF to ON, the unit will
remain in the previous mode (CM LED = ON), and the ERR LED will be ON.
Set the MOD switch back OFF, then remove the slave 0 or set the Mode Bit
OFF to allow a change to protected mode.
The AS-Interface 'Complete Specification' V2.04 defines two standard modes
of operation: Configuration Mode and Protected Mode. In the additional Setup
mode, the CQM1-ARM can be configured off-line, and can be used as a
configuration tool for slaves.
Once installed and configured, the AS-Interface master will normally be set to
Protected Mode. In this mode, only slaves that are in the list of projected
slaves (LPS) and whose configuration data image (CDI) and permanent
configuration data (PCD) are identical, will be activated.
The CDI and PCD of a slave are identical, if the input/output configuration and
the identification code of the slave stored in the list of detected slaves (LDS)
have the same values as those stored in the list of projected slaves (LPS)
under the same slave address.
If the Auto_Addressing function of the AS-Interface master is enabled
(default), it is possible to replace defective slaves by a 'blank' slave of the
same type on-line. A blank slave means a slave with its address set to '0', and
the same type means with identical ID code and identical I/O code. This
process is called 'Auto-programming'
When the master detects one missing slave while in Protected Mode, the
AUP LED will be set ON. The master will now scan the network for a slave
with address 0, and if detected, read its ID code and I/O code. If these match
the data of the missing slave in the master's permanent configuration, the
master will change the slave address 0 to that of the missing slave
automatically, and start exchanging I/O data. The AUP LED will go OFF.
If the user changes from Protected Mode to Configuration Mode while the
AUP LED is ON, the Auto-programming process will be aborted. Upon return
to Protected Mode, the Auto-programming process may be completed if there
is still one single slave missing .
In Configuration Mode, all detected slaves will be activated, even if they are
not in the 'projected' configuration, or if their actual ID code or I/O code do not
match the permanent configuration data. However, if there is a mismatch
between actual and permanent configurations, this will still be indicated with
the CER LED and by setting the Configuration_OK Flag in the PLC to OFF.
While in Configuration Mode, it is possible to store all configuration data of the
detected slaves in non-volatile memory as the 'projected' configuration
(permanent configuration). This is done by changing the SET switch from
OFF to ON position.
Auto-addressing can not be performed in Configuration Mode.
The Configuration Mode can not be left as long as a slave with address 0 is
detected. Setting the MOD switch to Protected Mode (=ON) will cause the
ERR LED to turn on, while the unit stays in Configuration Mode (CM LED
Section 4-3
29