Honeywell W7761A specifications Table C2. Control Parameters Right, Sh Ma Da Ev Hw Mn Ts

EXCEL 10 W7761A INPUT/OUTPUT DEVICE

Table C2. Control Parameters (Right).

Share (SH), Map (MA), Direct Access (DA)

E-Vision (EV): Calibrate (C), Monitor (M),

Parameter (P), Schematic (S)

Hardware Configuration (HW),

Manual Point (MN), Test (TS)

SH MA DA EV HW MN TS Comments

nviInUse is used by a management node to indicate to all other management nodes that it is logged on, to the Excel 10 node and that they should not try to interact with any of the Excel 10s network variables. Before the management node reads or writes any network variables, the management node checks nviInUse for a zero value meaning no other management nodes are already logged on and that a management node may log on, to the node. Then the management node writes a number, 1 through 65534, to nviInUse and periodically writes the same value to indicate that the management node is still logged on. If there are no writes made to nviInUse for approximately 60 seconds, then the Excel 10 resets nviInUse to zero to automatically log off the management node. Before interacting with any network variables, the management node verifies that the nviInUse has not changed. The management node logs off by writing 0 to nviInUse.

During power up, an application restart, or return to on-line from off-line, the Excel 10 sets nviInUse to 65535 to indicate to the management node that it has returned to on-line.

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