Details of Control and State Byte

Note

These bytes are managed by HA_CS31_CONTROL function block.

Structure of the Control Byte

Bit 0	Bit 1	Bit 2	Bit 3	Bit 4	Bit5	Bit6	Bit 7
CPU status: 0: CPU in STOP mode 1: CPU in RUN mode	Not used	Manual change over request: 0: No request 1: Request	Switch over acknowledgement: 0: No request 1: Request	Primary request 0: No primary request 1: Primary request	Not used	Not used	Life status: Toggles when CS31 Bus is active

Structure of Status Byte

Bit 0	Bit 1	Bit 2	Bit 3	Bit 4	Bit 5	Bit 6	Bit 7
Line information: 0: Line B 1: Line A	Other Bus Active: 0: Not Active 1: Active	Manual change over request: 0: No Request 1: Request	Digital O/P buffer different 0: Identical 1: Different	Other Bus Primary 0: Not primary 1: Primary	Analog O/P buffer different 0: Identical 1: Different	CI590-CS31-HA Initialization 0: Not done 1: Done	Life status: Toggles when CS31 Bus is active