ProSoft Technology PTQ-104C - Manual (Page 91)

49TPTQ-104C ♦ 48TQuantum Platform Hot Standby Support
47TIEC 60870-5-104 Client
12TUser Manual
%SW61.0 to 3: These bits display the state of the local and remote Hot Standby
PLCs.
%SW61.4: This bit is set = 1 whenever a logic mismatch is detected between the
Primary and Standby PLCs. This means that either the MID, CID or LID is
different on the two PLCs. Under this condition, if bit 13 of the Command
Register is set = 0, bit 1 of the Status Register will be set = 1.
%SW61.5: This bit identifies the order reported by the Copro at start time
depends on the range of the MAC addresses.
 If the A/B designation is A, then bit 5 will be set = 0.
 If the A/B designation is B, then bit 5 will be set = 1.
%SW61.14: If set = 1 it indicates that a logic mismatch has been detected that
disallows Unlocated Variables to be transferred from Primary to Standby. This
feature was canceled for UNITY V1.1 because it was determined that a
switchover with a partial application context posed too great a hazard.
%SW61.15: If set = 1 it indicates that the Copro device is set up correctly and
working.
ProSoft Technology, Inc. Page 91 of 136
March 4, 2013