7 Option: PtP communication
7.1 Fast introduction
For the PtP communication the use of the optionally available extension module EM M09
is required. The extension module provides interface X1: PtP (RS422/485) with fixed pin
assignment.
Ä
Chapter 2.4 ‘Mounting’ on page 13
n PtP functionality
–
Using the PtP functionality the interface is allowed to connect via serial point-to-
point connection to different source res. target systems.
The protocols respectively procedures ASCII, STX/ETX, 3964R, USS and Modbus are
supported.
The parametrization of the serial interface happens during runtime using the FC/SFC 216
(SER_CFG). For this you have to store the parameters in a DB for all protocols except
ASCII.
The FCs/SFCs are controlling the communication. Send takes place via FC/SFC 217
(SER_SND) and receive via FC/SFC 218 (SER_RCV). The repeated call of the FC/SFC
217 SER_SND delivers a return value for 3964R, USS and Modbus via RetVal that con-
tains, among other things, recent information about the acknowledgement of the partner
station. The protocols USS and Modbus allow to evaluate the receipt telegram by calling
the FC/SFC 218 SER_RCV after SER_SND. The FCs/SFCs are included in the consign-
ment of the CPU.
Use FCs instead SFCs
Please regard that the special VIP
A SFCs are not shown in the CPU.
Please use for programming tools e.g. Siemens SIMATIC Manager and
TIA Portal the according FCs of the VIPA library.
The following FCs/SFCs are used for the serial communication:
FC/SFC Description
FC/SFC 216 SER_CFG RS485 parameterize
FC/SFC 217 SER_SND RS485 send
FC/SFC 218 SER_RCV RS485 receive
More information about the usage of these blocks may be found in the
manual "SPEED7 Operation List" from VIP
A.
General
Protocols
Parametrization
Communication
Overview FCs/SFCs for
serial communication
VIPA System MICRO
Option: PtP communication
Fast introduction
HB400 | CPU | M13-CCF0000 | en | 16-47 155
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