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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 RemoteDrop Fea- | By Setting this HHM Option |
tures |
|
|
|
DeviceNumber(SBA) | Change Block ID Disabled |
ReferenceAddress |
|
Data Lengths (%I, %Q, %AI, %AQ) |
|
Remote Drop ID |
|
Module Options: Output Defaults |
|
Input Filter Time VoltageRange |
|
|
|
Baud Rate | Change Block Baud Disabled |
|
|
ConfigurationProtection | Change Block Config Disabled |
Redundancy Options * |
|
|
|
*NotavailablewithRemoteI/OScannerversionIC697BEM733A.
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.
20 | Series 90±70 Remote I/O Scanner User's Manual ± July 1992 |