Ascon tecnologic CU-02, Руководство пользователя

Страница: 30 / 46

Sigma due - sigmaPAC CU-02 - User manual
24
4-3 Communication Ports Protocols
sigma due CPU has various communication ports and protocols. The
combinations of ports and protocols are shown below:
Figure 4.5 - Communication Ports Protocols
Notes: 1. Modbus Master/Slave
2 Consult the Installation Guide to polarise and terminate the RS485 port.
4-4 Auxiliary digital port
The auxiliary digital port will be available for a PLC project, provided that the resource
is mapped on memory area that the project can see. The port is mapped as follows:
4-5 Watchdog Timer
Ascon CU-02 CPU contain a watchdog control, controlled by 2 specific FBs.
Watchdog is fundamentally a down counter, decremented in 100ms intervals.
When the count value reaches zero, two different behaviours of the system may
occur, depending on how the configuration is:
• PLC program keeps working, stores the event and force the Alarm relay to OPEN;
• PLC program performs a Reset and starts execution again.
Please note that the Watchdog timer is controlled by FB but it runs independently
of the PLC program. Therefore, if the program is stopped, e.g. during a debug
session, the timer keeps running, and behaves as programmed when the count
reaches zero.
During debug sessions it is advisable to maintain the Watchdog function disabled.
X1 Service Port connector:
Modbus Slave Protocol: RS232 or USB
X3, X4 Optional Port connector(s)
• RS232 + RS485 (note 1 and 2)
• RS232 + RS232 (note 1)
• PROFIBUS DP
X0 CAN connector:
CANopen
X2 Ethernet 10 base T LAN Port
• TCP/IP MODbus
• OPC Server
Port Mapping
WAKE-UP output %QX0.0
Alarm Output %QX0.1
General purpose digital input %IX0.0