Communication System Manual
UPS System: HIPULSE E
(Modbus/Jbus Interface) Description of Protocol
(04/07)
Page 5-17
5.11 FUNCTION 06: LIST OF EVENT HISTORY COMMANDS
Position Meaning Size (bytes) Values Format UPS MSS
40200 Alarm History Commands 2 Note 1 HEX
Note
:
value = 0x0101
Command to set pointer to last Alarm History block
value = 0x5555
Command to set pointer to previous Alarm History block
value = 0xAAAA
Command to erase Alarm History buffer
When a 'set pointer to last alarm' , 'set pointer to previous alarm’ or 'erase alarm history buffer' command is given, the
5F (08I) board automatically sends commands for reading board 7H (09J) in order to request the Alarm History buffer
to which the pointer is currently set.
If the Master Jbus/Modbus RTU sends a message requesting the selected alarm history during this time, the 5F (08I)
board will respond with an 0x4 error code stating that the Slave Jbus/Modbus RTU is busy.
If the Master Jbus/Modbus RTU sends a message requesting the selected alarm history buffer and has never sent at least
one of the commands listed above, the 5F (08I) board will respond with an 0x4 error code stating that the Slave
Jbus/Modbus RTU is busy.
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