Mitsubishi Electric AJ71C24-S6 User Manual page 116

7. INITIAL SETTING OF TRANSMISSION CONTROL DATA TO
BUFFER MEMORY
MELSEC-A
7.5
Settings
in
the Bidirectional Mode
This section describes how t o set items in the bidirectional mode and gives
examples.
The defaults set with the buffer memory section are for the no-protocol mode.
When the interface mentioned in (1) is used in the no-protocol mode, all
settings mentioned in this section are not necessary.
(1) Setting the bidirectional mode (address 112H)
When the mode setting switch (see Section 4.3.1) is set to "1" t o "8", set
the mode for the following interfaces to the bidirectional mode (see
Section 4.3.1).
*When the mode switch setting is "1" to "4": RS-422 interface
*When the mode switch setting is "5" t o "8": RS-232C interface
(2) Setting the time-out check time (address 113H)
Set the time-out check time which specifies the time from the beginning
of data send t o a computer connected through the bidirectional mode
interface until the reception of the response message (see the figure in
Section 10.5.1).
(3) Validlinvalid setting of data at simultaneous transmission (address 114H)
Set the data transmitted and received by the AJ71C24 t o validlinvalid 1
when a computer and the AJ71C24 begin simultaneously full-duplex send
in the bidirectional mode (see Section 10.6).
(4)
Setting the check sum enableldisable (address 115H)
Set whether the check sum code is added or not added to the message
when transmitted between the AJ71C24 and a computer in the bidirec-
tional mode. (see Section 10.5.2 (4)).
This setting is unrelated to the check sum setting (for dedicated protocol)
with SW21 of the AJ71C24.
Sections 7.4.3 to 7.4.5 give the settings of the following areas used in the
bidirectional mode. (Since the explanations in Sections 7.4.3 to 7.4.5 are
for the no-protocol mode, change the mode from non-protocol to bidirec-
tional when referring to these sections.)
I
*Bidirectional wordlbyte setting area:
. . . .
.
Section 7.4.3
I
.Bidirectional send area:
.
. . .
. . . .
. . . .
Section 7.4.4
I
*Bidirectional receive area:
. . .
. . .
. . . . .
Section 7.4.5
I
The mode with the dedicated protocol which is set with the mode setting
switch is always valid for the interface set to the dedicated protocol.