ISUPS2B004 Rev 1
Page 55 of 70
Ampcontrol Pty Ltd
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ISUPS 300Wh V2 USER MANUAL
ISUPS2B004 R2
– DEC/17
11.1.6 Holding Registers (4X References)
– Date & Time Registers Support Read/Write
Holding Registers (4X References)
– Control Registers Support Read/Write
Bit
Address
Name
Description
Modbus Functions Supported
301
Seconds In
BCD format
Seconds of the Time and Date in BCD format.
Valid range = 0X00 to 0X59
Read Holding Registers(0X03),
Pre-set Multiple Registers(0X10)
302
Minutes In
BCD format
Minutes of the Time and Date in BCD format.
Valid range = 0X00 to 0X59
Read Holding Registers(0X03),
Pre-set Multiple Registers(0X10)
303
Hours In BCD
format
Hours of the Time and Date in BCD format.
Valid range = 0X00 to 0X23
Read Holding Registers(0X03),
Pre-set Multiple Registers(0X10)
304
Date In BCD
format
Date of the Time and Date in BCD format.
Valid range = 0X01 to 0X31
Read Holding Registers(0X03),
Pre-set Multiple Registers(0X10)
305
Month In BCD
format
Month of the Time and Date in BCD format.
Valid range = 0X01 to 0X12
Read Holding Registers(0X03),
Pre-set Multiple Registers(0X10)
306
Year In BCD
format
Year of the Time and Date in BCD format.
Valid range = 0X00 to 0X99
Read Holding Registers(0X03),
Pre-set Multiple Registers(0X10)
306-400 Reserved
11.2 Log Reports
There are two separate logs kept in the UPS, a periodic log and an event log. These logs are accessible
through the Modbus interface using the ‘Read Holding Registers’ command as per the Memory Map.
To set the desired log entry to be reported for a Periodic or Event log, the entry number (index) needs to
be set in holding registers 1 and 2 respectively.
If a log entry is requested that does not exist in the log, then a Modbus error will be returned to the
Modbus master.
11.2.1 Event Log
The Event Log contains a text representation of the log entry. The entry details that are sent are (in
order), the Entry code (that is, the numeric value of the cause of the log entry), the Entry description (that
is, a short text summary of the cause of the log entry), the output current, the output voltage and the date
and time when the entry was logged.
Each entry detail is always the same size
– it will be padded with spaces to ensure the details remain the
same length. This allows the Modbus master to request sections of the string, if needed.
11.2.2 Periodic Log
The Periodic Log is reported in a raw binary manner
– i.e. strings do not represent the Periodic Log
records, but absolute raw values. The Periodic Log can hold up to 1,728 records.
11.3 Output Toggle Time
This timer can be used to toggle the output of the UPS remotely through Modbus. Setting this timer
immediately turns the output of the UPS off (if the output is already off it is kept off). The timer value
setting would be used to determine when to turn the output on after it was turned off. It is a read/write
register and the timer countdown is visible by reading this register.
