Communicating With The Plc: Comm Port Cycle; Serial Port To Plc; Rs-232 Com1 And Com2; Figure 5-5 Plc Scan: Comm Port Cycle - Siemens SIMATIC TI505 386/ATM User Manual

5.4

Communicating with the PLC: COMM Port Cycle

Serial Port to PLC

RS-232 Com1
and Com2
386/ATM Coprocessor User Manual
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Internal
diagnostics
I/O update
Relay
ladder
logic
Special
function
module
access
COMM
port
access
PLC CPU

Figure 5-5 PLC Scan: COMM Port Cycle

All third party software that communicates with Series 505 or Series 500
families of PLCs through the PLC serial port will operate on the 386/ATM.
Refer to the installation instructions accompanying the software package.
Com1 and Com2 are PC/AT-compatible serial communications ports with
standard handshaking. All third party PC/AT-compatible software that is
programmed for serial communications will operate on the module.
NOTE: The driving voltage is 5 VDC rather than the 12 VDC standard of
IBM-compatible PCs and may not work with all hardware, especially a
mouse.
PC COMM
Serial port
Serial
ports
386/ATM
PLC Communications
Application
Serial
1 or 2
I003101
5-11