Specifications

27
allocated for three characters (bytes) for serial receive. The total is ten bytes for
PLC I/O mapping.
Transmit Handshaking & I/O Mapping:
The Transmit Toggle byte for instances 1~8 are mapped in Output O:1.1
word bits 0~7. Each transmit toggle bit represents each instance. When transmit
Instance 1 is completed from DeviceNet to RS232 serial transmission, bit 0 at
Output O:1.1 toggles from 0 to 1. Instances 2~8 are similarly mapped to bits 1~7.
Data
Memory
Table
1514131211109876543210
:
:
Inst1=bit0, Inst2=bit1, .., Inst8=bit7
Instance 1: Receive ASCII Character 2
Instance 2: Receive Data Size (length)
Instance 2: Receive ASCII Character 2
1 byte = 8 bits 1 byte = 8 bits
1 Word Addressing I/O
Receive (Rx) Toggle: bits 8~15
Reserved Read-Only
Transmit (Tx) Acknowledge: bits 0~7
::
I:1.31
::
I:1.0
Instance 1: Receive ASCII Character 1 Instance 1: Receive Data Size (length)I:1.2
I:1.1
Inst1=bit8, Inst2=bit9, .., Inst8=bit15
I:1.3 Instance 1: Receive ASCII Character 3
Instance 2: Receive ASCII Character 1I:1.4
I:1.5 Instance 2: Receive ASCII Character 3
Input Memory Table of Allen Bradley 1747-SDN DeviceNet Master Scanner Module
Data
Memory
Table
1514131211109876543210
:
:
Transmit (Tx) Acknowledge: bits 0~7
Inst1=bit0, Inst2=bit1, .., Inst8=bit7
Instance 2: Receive Data Size (length)
Instance 1: Receive ASCII Character 3
Instance 2: Receive ASCII Character 3
M-File Input Table of Allen Bradley 1747-SDN DeviceNet Master Scanner Module
1 Word Addressing I/O
1 byte = 8 bits 1 byte = 8 bits
I:1.0
Reserved Read-Only
I:1.1
Receive (Rx) Toggle: bits 8~15
Inst1=bit8, Inst2=bit9, .., Inst8=bit15
M1:1.0 Instance 1: Receive ASCII Character 1 Instance 1: Receive Data Size (length)
::
M1:1.1
M1:1.2
Instance 1: Receive ASCII Character 2
Instance 2: Receive ASCII Character 1
M1:1.3
M1:1.149
::
Instance 2: Receive ASCII Character 2