Application Guide Chapter 4
GFK-2928C Oct 2019
Toolchest Components 17
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.
Note: Devices that contain outputs must be configured so that the dual mapping routine can post
loss-of-device or addition-of-device messages. Also, the device status (i.e., the presence on
either Bus A or Bus B) is shared between the Primary and Secondary PLCs for the purpose of
Automatic Role Switching (if enabled).
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