ProSoft Technology PTQ-PDPMV1 - Manual (Page 204)

Hot Standby Support PTQ-PDPMV1 ♦ Quantum Platform
User Manual PROFIBUS DP Master Network Interface Module for Quantum
Page 204 of 306 ProSoft Technology, Inc.
August 12, 2014
Word Offset 61 HSBY Passive Master Status Data
HSBY Passive # of Slaves (High byte) HSBY Passive Status (Low byte)
15 8 7 0
Active and Passive HSBY Master Status Data Low Byte - Bits 0 to 7
Note. Bits 0 to 7 are not considered valid until the "HS-bit" equals one, that is, the Master module
is initialized as a HSBY Master (passive or active). Once set, the "HS-bit" will keep this value for
the remaining active session until the Master module is either reset or HSBY-state changes to "Not
connected".
All bits would be set to zero at power-up, and when the HSBY-state equals "Not
connected".
HSBY Local Status
Bit Name Explanation
0 PA This bit indicates the state of the local Master.
0 = Local (active) Master: Master is controlled by the Primary PLC
1 = Remote (passive) Master: Master is controlled by the Standby PLC
1 SO This bit indicates if the local Master recognizes any of its assigned slaves.
0 = At least one slave is offline
1 = All slaves OK
2 CE This bit indicates if the local Master has recognized a critical error.
0 = No critical errors
1 = Critical error active
This bit is set when problems with the ping sequence are encountered. Detailed information
about the problem is dumped in the fieldbus-specific area at address hF90-FBC.
3 DB This bit indicates if the local Master has detected a database mismatch.
0 = Database OK
1 = Database mismatch
4 OD This bit indicates when the data in the Output area of the DPRAM is updated after a
switchover.
0 = Output data is not updated
1 = Output data is updated (When this bit is set, it remains set for the remaining session until
the Anybus is either reset or the HSBY state changes to "Not Connected")
5 - Not used; set to zero.
6 - Not used; set to zero.
7 HS This bit indicates that the Hot Standby functionality is enabled.
0 = HSBY disabled. Module operates as stand-alone Master or HSBY-state equals "Not
Connected".
1 = HSBY enabled.