CIAT Magister 2 Series, Installation, Operation, Commissioning, Maintenance

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95
Example:
Prog 1: 7-12h CSG1-CSG2 MTW TF
Prog 2: 10-18h CSG1-stop
MT TF
Holiday zone: 10-08 / 30-08 : stop
Prog 1: MTWTF Prog 2: MT W TF
Setting 1
Setting 1
Setting 2
Setting 2
Result:
Status: MT W TF Status: M T WTF
Setting 1
Setting 1
Setting 2
Setting 2
Saturday and Sunday not being selected in the hourly programming, the unit is therefore stopped.
The unit is stopped between 10th August and 30th August, this period being selected as holiday zone.
27 COMMUNICATION PROTOCOL
A) Communication medium
- RS485
3-pin connector on terminal 1 of terminal block J11: A or
+
Terminal 2: B or
–
Terminal 3: connected to earth
for shielding if desired
Two lights provide information on the status of the transmission
(see Section 3.1, control board)
- D50
→ Receive LED. Usually off; flashes when a message is
received by the board.
If this light remains on, the bus is reversed. Swap terminals 1 and
2 on J11.
- D52
→ Send LED. Usually off; lights up when the CPU sends a
message over the bus.
B) Transmission mode
Serial, asynchronous, half duplex, RTU mode.
- 1 start bit,
- 8 data bits,
- The parity is set via parameter P702,
The number of stop bits is set via parameter P703,
- The transmission speed is set via parameter P701,
- The unit number on the bus is set via parameter P705.
Coding of analogue values
Standard 32-bit IEEE format (2 registers).
Order of values:
- If P704 = No
→ low order, high order.
- Si P704 = Yes
→ high order, low order.
Function codes used.
1 or 2: read n bits
3 or 4: read multiple registers (16 bits)
5: write one b
it …………..
6: write register function………
8: read diagnostics counters
11: read event counter
15: write n bits
16: write multiple registers (16 bits)
Note: the write functions are enabled if parameter P103 is set to
"Remote, BMS…"
Error codes:
1: function code unknown
2: address incorrect
3: data error
27.1 Registers accessible by customer
Register No.
hexadecimal
Register
No.
decimal
Description Format Type
Registers accessible in read-only mode (Functions 3 or 4)
0x01 1 Controller name Decimal Read-only 33 = C
ONNECT
2
0x02 2 Actual operating mode Decimal Read-only
0x3 and 0x4 3 and 4 Outdoor temperature Float Read-only
0x5 and 0x6 5 and 6 Control setpoint Float Read-only
0x7 and 0x8 7 and 8 Evaporator inlet temperature Float Read-only
0x9 and 0xa 9 and 10 Evaporator outlet temperature Float Read-only
0xb and 0xc 11 and 12 Condenser temperature Float Read-only
0x13 19 Number of stages on Char Read-only
Available with versions
09.00 and higher
0x20 and 0x21 32 and 33 P285 Heating mode runtime (in hours) Float Read-only