Asycube - Asyril SA
Operating Manual
©
Copyright Asyril S.A.
Description
v1.7
FO 32.03.118
Operating Manual
Asycube
- Asyril SA
23/41
Communication Interface
2.5.
Specifications
2.5.1.
1 RS-232 AsyProbe (XS201)
1 RS-232/RS-485 AsyLink (XS202) (hardware selectable)
Baud rates 19200 fixed
1 start bit, 8 data bits, 1 stop bit, no parity
No checksum, but standard UART framing control and Message Integrity checked
Node address #0 allowed as RS-232 driver
Node address allowed #1... #15 as RS-485
Data Format: 16-
bits word 0 … 65536
Baudrate
2.5.2.
Only one device can drive the line at a time. The drivers must therefore be put into a high-
impedance mode (tri-state) when not in use. Some RS-485 hardware devices handle this
automatically. If not, the 485 device software must be used as a control line to handle the
driver. (The RTS handshake line will be used typically if your 485 device is controlled through
a RS-232 serial port). A consequence of tri-standing the driver is a delay between the end of
transmission and the moment when the driver is tri-stated. This turn-around delay is an
important part of a two-wire network because during that time no other transmissions can
occur.
RS232 notice:
A delay time must be inserted before the next message (T5 = 4mS) is sent. RTS (Line driver) is typically
used as control but is not connected in the 485 Network.
RTS (Line driver)
HOST COMPUTER (serial com)
DO/RI (RS485) TXD (RS232
DO/RI (RS485)
DO/RI (RS485) RXD (RS232
DO/RI (RS485)
RTS (Line driver)
SLAVE (serial com)
t1
t2
t3
t4
T6
T5
t1: 2mS Select driver
t2: 2mS Disable driver
t3: 2mS Select driver
t4: 2mS Disable driver
T5: 4mS min. waiting for the next command
T6: 6mS (Response time)
Summary of Contents for Asycube
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