Chapter 4. Toolchest Components
20
PACSystems* RX3i Genius Dual Bus Application Guide
GFK-2928
Dual Bus Parameters
Figure 19: Dual Bus Parameters
BUS.DEF_TO
The Default Timer Preset establishes the time interval (in milliseconds) during which
inputs are frozen while a device is missing from
Bus A
AND from
Bus B
.
BUS.DEF_HLS
This parameter (a Boolean) determines the behavior of a missing device:
•
If the parameter is set to 0, the inputs for that device will default to OFF or 0
after the Default Timer expires.
•
If the parameter is set to 1, the inputs for that device will be frozen in their last
state until the device is reattached to either
Bus A
or
Bus B
.
BUS.DI_OFST
This applies to discrete inputs. It is the reference offset between a discrete input
configured on
Bus A
and the alternate address on
Bus B
. For instance, a device
configured at %I0001 on
Bus A
must be configured at %I (1+
DI_OFST
) on
Bus B
.
The offset must be in multiples of 8 (i.e., on a byte boundary).
BUS.AI_OFST
This applies to analog inputs. It is the reference offset between an analog input
configured on
Bus A
and the alternate address on
Bus B
. For instance, a device
configured at %AI0001 on
Bus A
must be configured at %AI (1+
AI_OFST
) on
Bus B
.
Figure 20: References by SBA of Genius Devices on Bus
BUS.Devices[nn].DI_Add
This parameter applies to devices that contain discrete inputs. It is the starting
reference assignment for the device installed at Serial Bus Address
nn
.
BUS.Devices[nn].DI_Len
This parameter applies to devices that contain discrete inputs. It is the number of
inputs (i.e., length) associated with the device installed at Serial Bus Address
nn
.
BUS.Devices[nn].DQ_Add
This parameter applies to devices that contain discrete outputs. It is the starting
reference assignment for the device installed at Serial Bus Address
nn
.
BUS.Devices[nn].DQ_Len
This parameter applies to devices that contain discrete outputs. It is the number of
outputs (i.e., length) associated with the device installed at Serial Bus Address
nn
.
BUS.Devices[nn].AI_Add
This parameter applies to devices that contain analog inputs. It is the starting
reference assignment for the device installed at Serial Bus Address
nn
.
BUS.Devices[nn].AI_Len
This parameter applies to devices that contain analog inputs. It is the number of
inputs (i.e., length) associated with the device installed at Serial Bus Address
nn
.
BUS.Devices[nn].AQ_Add
This parameter applies to devices that contain analog outputs. It is the starting
reference assignment for the device installed at Serial Bus Address
nn
.
BUS.Devices[nn].AQ_Len
This parameter applies to devices that contain analog outputs. It is the number of
outputs (i.e., length) associated with the device installed at Serial Bus Address
nn
.
