Siemens Climatix Series - 4 Commissioning Modbus; Commissioning Internal Modbus RTU

4. Commissioning Modbus
4.1 Commissioning internal Modbus RTU
The illustration shows the devices and connections involved in commissioning:
USB
T-SV
REF B – A +
RS 485
T 9
BSP BUS
T –HI
Ethernet
T–IP
CE – CE +
PB
T 8
POL638.00
Q63 Q64 Q54 Q53
24...230V~
Q6
T 7
Q5
Q43 Q44 Q34 Q33
24...230V~
Q4
T 6
Q3
Q23 Q24 Q14 Q13
Q2Q1
Y2
M
Y1
T 3
24V
0V
T 1
D2
M
D1
T4
D3 D4
M
D5
M
X2
M
X1
T4
+24V +24V
X3 X4
M
X5 X6 X7 X8
M M
Modbus RTU
HMI-DM
RS485
POL638.00
POL895.50
Proceed as follows to connect the Climatix controller to the Modbus bus:
Stage Action
1
Switch OFF the power to the controller.
2 Connect Modbus bus cable to RS485 interface (pins A+ ,B-, Ref ).
3
Switch ON the power to the controller.
Proceed as follows to configure the controller for internal Modbus RTU:
Stage Action
1 Log onto HMI by entering the password 2000.
2
Select Main menu > System overview > Communication > Modbus >
3
Select Internal Modbus:
Select the integrated Modbus-interface RS485 to be used as a slave.
Warning!
The integrated RS485 cannot be used as a slave if already used as a
Master. This selection is blocked when a function requires a Master.
4
Select Internal slave address:
Enter the correct Modbus slave address (1…247).
Caution!
This selection is true for the Modbus TCP as well.
5
Select Internal settings for RS485 >
6
Select the Baudrate:
Enter the transmission rate for the Modbus (2400, 4800, 9600, 19200 or
38400). All the units connected in the chain must have the same setting.
7
Select Modbus stop bits:
One or two stop bits
All the units connected in the chain must have the same setting.
8
Select Parity:
None, Even or Odd parity
All the units connected in the chain must have the same setting.
9
Select Delay time:
Delays the response time by X milliseconds.
-
Modbus timeout:
For setting the access time if unit is used as a Master.
The Modbus Master must have time to read data within this time,
otherwise an alarm will trip. This has no significance if the unit is run as
a slave.
Present units
Connection
Configuration via hand
unit
Short Manual for Climatix Control System [v. 2.14.10, 2.14.20, 2.14.30 & 2.14.40]
SMCX.130215.02GB Page 24