Siemens 7 manual Internal Driver States

Multiplexer Driver Developer’s Guide

7.2 Internal Driver States

s

7.2Internal Driver States

rcv. a DM-Frame

STATE_

DISCONNECT

REQUEST

WrDisconnectPort(), send a DISC-Frame

STATE_

CONNECT

SerMux internal states

STATE_CLOSE_

DOWN

initial state

send a SABM-Frame

STATE_

DISCONNECT

WrConnectPort()
send aSABM-Frame
rcv. a DM (Disconnect)
Frame
	STATE_
	CONNECT_
WrConnectPort()	REQUEST
send a SABM-Frame
STATE_	rcv. a TEST-command
VERSION_ERROR
this state exists	with a VERSION Controlbyte
only for port 0

STATE_

not correct Version VERSION_

REQUEST

this state exists only for port 0

Versionstring from

MS- and TS-Version are identical

for Ports other than port 0

receive a UA-Frame for the desired port

Figure 4: State diagram of the internal driver states

Mux_Drv_DevGuide_v07	Page 28 of 36	2006-9-27
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