Rockwell Automation 937CU-AISTR-DC1 Strain Gauge Converter Installation Instructions User Manual
Page 41
The
Strain Gauge Converter can request the following information via the RS 485 interface e. g.
from a PC or a PLC (with 3 decimal places each):
•
Net measured value (in the set unit
)
•
Gross measured value (in the set unit)
•
mV measured value (
in the set unit)
•
Output value current output (in mA)
The following commands are available for the requests:
•
Null: delete the receive buffer of the requesting device
•
Check_1: checks whether
Strain Gauge Converter (with the respective address) is connected
•
Get_value_ch1: requests the net measured value
•
Get_value_ch2: requests the gross measured value
•
Get_value_ch3: requests the mV measured value
•
Get_current: requests the output value current output
Requests via the RS 485 interface are not suitable for time-critical or safety-critical
applications.
At the beginning of each RS
485 communication, send the request Check_1.
The RS
485 interface is deactivated if a connector is plugged into the programming
jack (RS
232 interface).
When the connector is removed, the request Check_1 is required to switch to RS
485
communication.
Warning
Note
Bul. 937
C Strain Gauge Converter Installation Instructions
39