phytron IXEa-A Series, Руководство пользователя

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phytron
®
MA 1206-A001 GB 25
3.2 General Remarks for the Computer Mode
Control units without keyboard:
The Remote/Local switch on the IXE
α−
RS should be positioned on Remote. If not, control
from the external computer is not possible!
Control units with keyboard:
The Computer mode is accessed from the Monitor mode .
Interface RS IEC
Instruction TS TE
Display RS232 IEEE488
Now, the control unit can only be controlled from the external computer.
The communication program for PC from PHYTRON,
α
-COMM simplifies the control and
programming of the units via external computer.
In the Computer mode , there are 3 different ways of communicating between the
computer and the control unit:
1. During program edition and run the computer remains connected to the control unit.
The instructions are exchanged by means of a software handshake protocol (no X-
ON/X-OFF). For control units without keyboard, the mode selector must be
positioned on REMOTE.
2. The program is edited on the computer. Then it is loaded via interface in the CMOS-
RAM memory of the control unit. After this transmission, the computer can be
disconnected. The program is started by positioning the REMOTE/LOCAL switch on
LOCAL.
3. The program is stored in the CMOS-RAM memory of the control unit. During
program execution, the control unit remains connected to the computer. If required,
the unit accesses the computer, for example to send current data or to receive new
instructions. For control units without keyboard, the REMOTE/LOCAL switch should
be positioned on LOCAL.
3.2.1 Status Register
It is only possible to send instructions from the PC to the control unit, when the latter is
ready to receive them.
Before sending any instruction it is recommended to read the contents of the status
register of the control unit.
Instruction: ST Read status byte