Newport MM4006, Руководство пользователя

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MM4006
Appendix C — Connector Pinouts
Computer
RS-232-C
Interface
RS-232-C T X +
to T X -
RS-485 R X +
Converter R X -
RX+
RX-
TX+
TX-
RX+
RX-
TX+
TX-
RX+
RX-
TX+
TX-
MM4006
Controller
#01
MM4006
Controller
#02
MM4006
Controller
#31
In this mode of communication each controller must have a single address,
from 1 to 31, this address must be different for each controller.
In this network communication, if some controllers are switched off, the
others will still continue to work. And, it is no delay in the communication,
all controllers receive the commands at the same moment. This is more
efficient than daisy chaining, in daisy chaining the computer send com-
mand to the first controller who repeat that command to the next one, who
repeat to the next one and so on. The daisy chaining puts a lot of traffic on
the communication line, introduce repeater delays and will not work if any
of the controllers is switched off.
The standard command set of the MM4006 controller is directly usable
with the following changes:
• E a c h command must be initiated with the string address:: to be under-
stood b y the right controller. For example for a single computer you
send a command like 1OR (home axis 1), this same command will be
1::1 OR (controller 1, home axis 1).
• F o r commands to which the controller has to respond, e.g.: 1TP tell
position of axis 1, you should operate with care to avoid any collision on
the communication lines. Only one controller should be asked t o
respond at a time and the computer must wait the reception of the
response before interrogating an other controller. So to avoid some of
the possible collisions, in this mode commands without axis number to
which the controller has to respond will be ignored by the controller.
For example commands like TP tell position of all axes will be ignored.
To do the same the computer should issue these commands axis per
axis and wait the response each time before issuing the next one.
CA)
ED110181En1020 — 03/03
8.18 N e w p o r t .