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Series 90–70 Remote I/O Scanner User’s Manual – July 199220
Configuration Protection
After configuring a Remote Drop, it is important to prevent inadvertent change while
the system is in operation. For this reason, Logicmaster 90–70 automatically protects
any configuration you download to a Remote I/O Scanner.
A configuration done with a Hand–held Monitor should be protected as described in
chapter 6.
Any Hand–held Monitor used with the system while it is operating should be set up
to prevent undesirable configuration changes:
Protect These Remote Drop Fea-
tures
By Setting this HHM Option
Device Number (SBA) Change Block ID Disabled
Reference Address
Data Lengths (%I, %Q, %AI, %AQ)
Remote Drop ID
Module Options: Output Defaults
Input Filter Time Voltage Range
Baud Rate Change Block Baud Disabled
Configuration Protection
Redundancy Options *
Change Block Config Disabled
* Not available with Remote I/O Scanner version IC697BEM733A.
To prevent access to restricted HHM configuration options, remove the HHM key.
Caution
If configuration protection is removed from the Remote I/O Scanner
and the Hand–held Monitor’s Change Block ID option is
ENABLED, the HHM’s automatic configuration capability can
overwrite any existing I/O configuration, including one created using
Logicmaster 90–70, or downloaded using a Write Map datagram.
This automatic reconfiguration will also set any module options (see
the table above) back to their defaults.