Toshiba PA912 - Byte-Swap Mode Specifications; Serial Communication Port (RS-232 C) Transmission; Specifications

Appendix A Specifications
6F8C1259
90
A.5 Serial Communication Port (RS-232C) Transmission
Specifications
Table A-6 Serial specifications
Item
Specifications
Data transmission
speed
Max. 9600 bps
Synchronization
method
Asynchronous
Transmission cable Cross cable with 9-pin-9-pin D-sub connector
Cable length Max. 15 m
Communication method Half duplex
Communication setting
・
Parity bit: none
・
Character length: 8 bits
・
Stop bit: 1 bit
A.6 Byte-swap mode Specifications
With Byte-swap mode,PA912 automatically rearrange data of the byte address
order in TC-net I/O loop common area ,both Input and Output area, via
PROFIBUS Slave I/Os by referring the Slave I/O’s configuration information.
So, data in TC-net I/O loop common area is converted to little-endian
ordinarily. Expectation is the case of which Slave I/O transfer its data to
PROFIBUS as little-endian order with word-type. Data transferring type is
depend on the Slave I/O’s manufacturer’s specification, and At that case User
is needed to send byte-swap command by nv-tool (Detail is described at
Chapter. 3 )
Table A-7 PROFIBUS I/O’s Transfer specifications
ＰＲＯＦＩＢＵＳ Slave I/O
Transfer Specification
Byte-swap
mode
Data
Format type
Order
Valid In-valid
Byte － ○ ×
Word
Big-endian ○ ○
Little-endian □ ×
○ ：Order in the TC-net common area is correct .and No need for
additional setting.
□：Order in the TC-net common area is incorrect.(Byte-swap is
occurs) and User is needs for additional setting by nv-tool.
×： Order in the TC-net common area is incorrect.(Byte-swap is
occurs). and User is needs to set PA912 as byte-swap mode.