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CHAPTER 8 FUNCTIONS
(6) Link special relays (SBs) and link special registers (SWs) related to the
standby master function
Link special relays (SBs) and link special registers (SWs) related to the standby master function are listed below.
(a) Link special relays (SBs)
Link special relays (SBs) related to the standby master function are listed below.
Values in parentheses are buffer memory addresses and bit numbers.
• Refresh instruction at standby master switching (SB0001) (5E0H, b1)
• Forced master switching (SB000C) (5E0H, b12)
• Refresh instruction acknowledgement status at standby master switching (SB0042) (5E4H, b2)
• Refresh instruction complete status at standby master switching (SB0043) (5E4H, b3)
• Forced master switching executable status (SB0046) (5E4H, b6)
• Master switching request acknowledgement (SB005A) (5E5H, b10)
• Master switching request complete (SB005B) (5E5H, b11)
• Forced master switching request acknowledgement (SB005C) (5E5H, b12)
• Forced master switching request complete (SB005D) (5E5H, b13)
• Host standby master station setting information (SB0062) (5E6H, b2)
• Master station information (SB0070) (5E7H, b0)
• Standby master station information (SB0071) (5E7H, b1)
• Master station return specification information (SB0079) (5E7H, b9)
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• Host master/standby master operation status (SB007B) (5E7H, b11)
(b) Link special registers (SWs)
8.2 Improving the System Reliability
8.2.5 Standby master function
Link special registers (SWs) related to the standby master function are listed below.
Values in parentheses are buffer memory addresses.
• Refresh instruction at standby master switching result (SW0043) (643H)
• Forced master switching instruction result (SW005D) (65DH)
• Standby master station number (SW0073) (673H)
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