Description of Hot Standby Premium System Words %SW60 to %SW65

Word Symbol
%SW60 HSB_CMD	Function	Premium Hot Standby command register
Initial State	0
Meaning of the different bits of the word %SW60: %SW60.1: =0 sets PLC A to OFFLINE mode. =1 sets PLC A to RUN mode. %SW60.2: =0 sets PLC B to OFFLINE mode. =1 sets PLC B to RUN mode. %SW60.4 OS Version Mismatch: =0 If OS Versions Mismatch with Primary, Standby goes to Offline mode. =1 If OS Versions Mismatch with Primary PLC, Standby stays in standby mode. Firmware OS Mismatch.This relate to main processor OS version, embedded copro OS version, monitored ETY OS version and enables a Hot Standby system to operate with different versions of the OS running on the Primary and Standby.
%SW61 HSB_STS	Function	Premium Hot Standby status register
Initial State	0
Meaning of the different bits of the word %SW61.0 to %SW61.6: %SW61.0 and %SW61.1 Status of local PLC: %SW61.1 = 0 and %SW61.0 = 1: OFFLINE mode. %SW61.1 = 1 and %SW61.0 = 0: Primary mode. %SW61.1 = 1 and %SW61.0 = 1: Standby mode. %SW61.2 and %SW61.3 Status of remote PLC: %SW61.3 = 0 and %SW61.2 = 1: OFFLINE mode. %SW61.3 = 1 and %SW61.2 = 0: Primary mode. %SW61.3 = 1 and %SW61.2 = 1: Standby mode. %SW61.3 = 0 and %SW61.2 = 0: the remote PLC is not accessible (Power off, no communication). %SW61.4 is set=1: whenever a logic mismatch is detected between the Primary and Standby controllers. %SW61.5 is set to 0 or 1, depending on the Ethernet copro MAC address: =0 the PLC with the lowest MAC address becomes PLC A. =1 the PLC with the highest MAC address becomes PLC B. %SW61.6: this bit indicates if the CPU-sync link between the two PLC is valid: %SW61.6 = 0: the CPU-sync link is valid.The content of bit 5 is significant. %SW61.6 = 1: the CPU-sync link is not valid. In this case, the contents of the bit 5 is not significant because the comparison of the two MAC addresses cannot be performed.
Continued %SW61 HSB_STS	Function	Premium Hot Standby status register
Initial State	0
Meaning of the different bits of the word %SW61.7 to %SW61.9 and %SW61.15: %SW61.7: this bit indicates if there is a Main Processor OS version mismatch between Primary and Standby: =0: no OS version firmware mismatch. =1: OS version mismatch. If OS version mismatch is not allowed in the command register (bit 4 = 0), the system will not work as redundant as soon as the fault is signaled. %SW61.8: this bit indicates if there is a COPRO OS version mismatch between Primary and Standby: =0: no COPRO OS version mismatch. =1: COPRO OS version mismatch. If OS version mismatch is not allowed in the command register (bit 4 = 0), the system will not work as redundant as soon as the fault is signaled. %SW61.9: this bit indicates if at least one ETY module does not have the minimum version: =0: all the ETY modules have the minimum version. =1: at least one ETY module doesn't have the minimum version. In this case, no Primary PLC could start. %SW61.10: this bit indicates if there is a Monitored ETY OS version mismatch between Primary and Standby: =0: no Monitored ETY OS version mismatch. =1: Monitored ETY OS version mismatch. If OS version mismatch is not allowed in the command register (bit 4 = 0), the system will not work as redundant as soon as the fault is signaled. %SW61.15: If %SW 61.15 is set = 1, the setting indicates that Ethernet Copro device is set up correctly and working.
%SW62 HSBY_REVERSE0 %SW63 HSBY_REVERSE1 %SW64 HSBY_REVERSE2 %SW65 HSBY_REVERSE3	Function	Premium Transfer word
Initial State	0
Platforms	Premium: Yes	Atrium: No
These four words are reverse registers reserved for the Reverse Transfer process. These four reverse registers can be written to the application program (first section) of the Standby controller and are transferred at each scan to the Primary controller.

Word

Symbol

%SW60

HSB_CMD

Function

Premium Hot Standby command register

Initial State

0

Meaning of the different bits of the word %SW60:

%SW60.1:
- =0 sets PLC A to OFFLINE mode.
- =1 sets PLC A to RUN mode.
%SW60.2:
- =0 sets PLC B to OFFLINE mode.
- =1 sets PLC B to RUN mode.
%SW60.4 OS Version Mismatch:
- =0 If OS Versions Mismatch with Primary, Standby goes to Offline mode.
- =1 If OS Versions Mismatch with Primary PLC, Standby stays in standby mode.
  
  Firmware OS Mismatch.This relate to main processor OS version, embedded copro OS version, monitored ETY OS version and enables a Hot Standby system to operate with different versions of the OS running on the Primary and Standby.

%SW61

HSB_STS

Function

Premium Hot Standby status register

Initial State

0

Meaning of the different bits of the word %SW61.0 to %SW61.6:

%SW61.0 and %SW61.1 Status of local PLC:
- %SW61.1 = 0 and %SW61.0 = 1: OFFLINE mode.
- %SW61.1 = 1 and %SW61.0 = 0: Primary mode.
- %SW61.1 = 1 and %SW61.0 = 1: Standby mode.
%SW61.2 and %SW61.3 Status of remote PLC:
- %SW61.3 = 0 and %SW61.2 = 1: OFFLINE mode.
- %SW61.3 = 1 and %SW61.2 = 0: Primary mode.
- %SW61.3 = 1 and %SW61.2 = 1: Standby mode.
- %SW61.3 = 0 and %SW61.2 = 0: the remote PLC is not accessible (Power off, no communication).
%SW61.4 is set=1: whenever a logic mismatch is detected between the Primary and Standby controllers.
%SW61.5 is set to 0 or 1, depending on the Ethernet copro MAC address:
- =0 the PLC with the lowest MAC address becomes PLC A.
- =1 the PLC with the highest MAC address becomes PLC B.
%SW61.6: this bit indicates if the CPU-sync link between the two PLC is valid:
- %SW61.6 = 0: the CPU-sync link is valid.The content of bit 5 is significant.
- %SW61.6 = 1: the CPU-sync link is not valid. In this case, the contents of the bit 5 is not significant because the comparison of the two MAC addresses cannot be performed.

Continued

%SW61

HSB_STS

Function

Premium Hot Standby status register

Initial State

0

Meaning of the different bits of the word %SW61.7 to %SW61.9 and %SW61.15:

%SW61.7: this bit indicates if there is a Main Processor OS version mismatch between Primary and Standby:
- =0: no OS version firmware mismatch.
- =1: OS version mismatch. If OS version mismatch is not allowed in the command register (bit 4 = 0), the system will not work as redundant as soon as the fault is signaled.
%SW61.8: this bit indicates if there is a COPRO OS version mismatch between Primary and Standby:
- =0: no COPRO OS version mismatch.
- =1: COPRO OS version mismatch. If OS version mismatch is not allowed in the command register (bit 4 = 0), the system will not work as redundant as soon as the fault is signaled.
%SW61.9: this bit indicates if at least one ETY module does not have the minimum version:
- =0: all the ETY modules have the minimum version.
- =1: at least one ETY module doesn't have the minimum version. In this case, no Primary PLC could start.
%SW61.10: this bit indicates if there is a Monitored ETY OS version mismatch between Primary and Standby:
- =0: no Monitored ETY OS version mismatch.
- =1: Monitored ETY OS version mismatch. If OS version mismatch is not allowed in the command register (bit 4 = 0), the system will not work as redundant as soon as the fault is signaled.
%SW61.15: If %SW 61.15 is set = 1, the setting indicates that Ethernet Copro device is set up correctly and working.

%SW62

HSBY_REVERSE0

%SW63

HSBY_REVERSE1

%SW64

HSBY_REVERSE2

%SW65

HSBY_REVERSE3

Function

Premium Transfer word

Initial State

0

Platforms

Premium: Yes

Atrium: No

These four words are reverse registers reserved for the Reverse Transfer process. These four reverse registers can be written to the application program (first section) of the Standby controller and are transferred at each scan to the Primary controller.