Moeller PS 416-BGT-4 Series, Аппаратное обеспечение и инженерия, Страница: 127 / 150

Direct Communication with
Data Terminal Units via the
COM Function Block
124
02/98 AWB 27-1208-GB
Test and
commissioning The interface is ready for operation after the power
supply is switched on and the “run” and “ready”
LEDs are lit. In order for a data transfer to be
possible, the interface parameters must correspond
with those of the data terminal unit and the data
cable must be connected correctly. The
“InterfaceStatus” output indicates a correct interface
setting after the first “TransmitStrobe” or
“ReceiveStrobe” signal.
The interface must only be assigned to one COM
function block.
The data transfer of the interface and the connected
data terminal unit is controlled via the coresponding
COM function block invocation with the central unit
in RUN mode.
Testing the user
program IL status display
The status display of the CIM function block is the
same as for other function blocks. The states of the
function block inputs/outputs and the operands are
indicated dynamicllay on screen positions
concerned.
Error diagnostics The communication interface offers diagnostic
options via the “InterfaceStatus”, “SlotError”,
“TransmitError” and “ReceiveError” function block
outputs.
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