Pag. 78 di 152
Holding Registers
Addr.
Type
Description
Range [Unit] or Bitmap
Notes
140
:
155
Byte Array
ASCIIZ String
Active Timezone Name
This group of registers is updated on each read
access to the first register.
Read queries not including the first address, will
give not updated values.
Write queries involving at least one register of
these, initiate a search in the timezone names
table.
On success, the clock will be adjusted according to
the rules of the specified timezone.
On fail, the instrument answers with an exception
response of type 04.
156
Integer Word
Active Timezone Index
0-n
See Updated Timezones Table
157
158
Bitmapped
(4 bytes)
Wall Time:
Day, Month, Year,
Century
Bits 31 ÷ 24: Century
Bits 23 ÷ 16: Year
Bits 15 ÷ 8: Month
Bits 7 ÷ 0: Day of Month
Only date values in the range of 1/1/2004 and
31/12/2099 will be accepted. If an invalid
combination is settled for Century, Year, Month and
Day fields, the instrument answers with an
exception response of type 04.
These registers must be written within the same
modbus query.
The instrument answers with an exception
response of type 04, to those write query involving
only one of these registers.
159
160
Bitmapped
(4 bytes)
Wall Time:
Seconds, Minutes,
Hours,
DST flag
Bits 31 ÷ 25: Unused
Bit 24: DST flag
Bits 23 ÷ 16: Hours
Bits 15 ÷ 8: Minutes
Bits 7 ÷ 0: Seconds
DST flag = 1 means Daylight Saving Time in use.
The DST flag's value will be ignored if written date/
time values are not compatible with it.
If an invalid combination is settled for Hours,
Minutes and Seconds fields, the instrument
answers with an exception response of type 04.
These two registers must be written within the
same modbus query.
The instrument answers with an exception
response of type 04 to those write query involving
only one of these registers.
