Siemens Climatix S300 HRV - Edit Schedule

6.3.7 Edit schedule
A BA-weekly schedule has 7 daily schedules (corresponding to Monday – Sunday).
Each daily schedule includes a list of [Time, Value] in pairs. The list describes the
sequence of scheduled actions for a given day of the week.
The data structure of each [Time, Value] pair is encoded in 2MODBUS holding
registers with the following structure:
Register
Address
b15 b1
4
b1
3
b1
2
b1
1
b1
0
b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
x
NULLVal Hours (00…23; 0x7F) Minutes (00…59; 0xFF)
X+1
Value
MODBUS structure for [Time,Value] pair (16bit)
● Mapped time information on MODBUS does not support encoding in seconds
and hundredths of a second.
● Flag
NULLVal
=1: Encode Value=NULL, i.e. it disables this entry.
● Flag
NULLVal
=0: Field value is a valid value≠NULL, i.e. this enables this
time entry.
● Void [Time, Value] pair is encoded with Hours=0x7F and Minutes=0xFF. In
this case, the field value is interpreted as a void value.
● Depending on the schedule type, the register value can be:
– A multistate Value>0, encoded at 16bit
– Or a binary where only the values 0x0000 or 0x0001 are allowed.
– Example: multistate ROpMod encoding.
Register
Address
Register
Value
X
NULLVal:
0
Hours: 00 Minutes 00
X+1
Unoccupied (Value=2)
X+2
NULLVal:
0
Hours: 06 Minutes 00
X+3
Economy (Value=3)
X+4
NULLVal:
0
Hours: 22 Minutes 30
X+5
Unoccupied (Value=2
X+6
NULLVal:
1
Hours: 0x7F Minutes 0xFF
X+7
--
…
…
X+30
NULLVal:
1
Hours: 0x7F Minutes 0xFF
X+31
---
MODBUS structure for daily-schedule for 16bit OpMode value
X=Schedule register address
● MODBUS mapping of the BA-daily-schedule reserves a fixed number of
16[Time,Value] pairs.
● The [Time, Value] entries are sorted (by time, ascending).
● We recommend starting the 1st entry at [00:00,Value] for a clear value
definition after midnight (the BA schedule default may otherwise be active).
Engineering of communicative devices
Modbus slave
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