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Basic principles, overview and ordering information
© 2002 Wieland Electric GmbH Version 2.4* (December 2002)
Part no. 05.591.3389.0
© 2002 Wieland Electric GmbH
87
Process image of the module
Bit
7…0
7…0
7…0
7…0
7…0
7…0
7…0
7…0
7…0
7…0
Byte
high
low
high
low
high
low
high
low
high
low
input
EB0
EB1
EB2
EB3
EB4
EB5
EB6
EB7
status
byte 0
status
byte 1
output AB0
(*)
AB1
(*)
AB2
AB3
AB4
AB5
AB6
AB7
control
byte 0
control
byte 1
Word
input
EW0
EW1
EW2
EW3
EW4
output
AW0
AW1
AW2
AW3
AW4
(*)
During configuration, the meaning of these bytes change to Config0 and Config1, respectively.
Structure of status byte 0
This byte is reserved for handshake functions and special protocols (check sum
etc.)
Structure of status byte 1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
IL2
IL1
IL0
BUF_F
IA
RR
TA
This
value is
always 0
Number of characters received.
Example:
(IL2; IL1; IL0) =
(0; 0; 1) = 1
dec
:
=> 1+1 = 2 characters were
received.
They lie in data byte 0 to data
byte 7.
0: No
meaning.
1: Buffer Full
Initialisation
Acknowledge
Receive
Request
Transmit
Acknowledge
Structure and meaning of byte Config 0
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Type 0 HS1 HS0
Baud3
Baud2
Baud1 Baud0
0 = RS232
1 = RS485
Always 0 Handshake:
(0, 0) = no handshake
(1, 1) = RTS/CTS
Baud rate (Values must be entered in binary format)
0 = 300Bd, 1 = 600Bd, 2 = 1200Bd, 3 = 2400Bd,
4 = 4800Bd, 5 = 9600Bd, 6 = 19200Bd, 7 = 38400Bd.
Values of 8..15 are not permitted.
Structure and meaning of byte Config 1
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
FRM1
FRM10
0 = Even parity
1 = Even parity
2 = Odd parity
3 = No parity
It is defined in bit 2 to bit 7, whether the interface should be set to block or single
byte receipt.