Rice Lake 920i Installation Manual V3.12 - Manual (Page 56)

50 920i Installation Manual
3.2.8 FLDBUS Menu
The FLDBUS menu is shown only if a DeviceNet, Profibus, EtherNet/IP, or ControlNet option card is installed.
The SWAP parameter on the FLDBUS menu enables byte swapping by the
iRite
BusCommand handler rather
than requiring a SWP (SWAPBYTE) instruction in the PLC. Byte swapping is enabled by default for DeviceNet
cards; for all other fieldbus cards, byte swapping is disabled by default.
• BYTE swaps bytes within the word before transmission to the scanner
• WORD swaps words 1 and 2, 3 and 4, within a 4-word packet
• BOTH performs both operations, swapping bytes within a word and swapping words within the packet
• NONE disables swapping
The DATASIZE parameter sets the size of the BusCommand handler data transfers. The default value (8 bytes)
matches the default data size specified in the EDS and GSD files, and used by the standard discrete transfer
commands. DATASIZE can be set to any value from 2–128 bytes (1–64 words), but the value specified must
match the data size set for the PLC Scanner I/O data size.
Figure 3-18. FLDBUS Menu
TWZERO 40
0–65535 Tweak zero. Enter tweak value to adjust the analog output zero calibration. Use a multimeter to
monitor the analog output value.
TWSPAN 59650
0-65535 Tweak span. Enter tweak value to adjust the analog output span calibration. Use a multimeter to
monitor the analog output value.
FLDBUS Menu
Parameter Choices Description
Level 2 submenus
SWAP NONE
BYTE
WORD
BOTH Specifies byte-swapping used for the fieldbus card. For DeviceNet cards, this parameter defaults to
BYTE; for all other cards the default value is NONE.
NOTE: In Version 3.08 firmware, this parameter supports values of YES (byte swapping) or NO.
Version 3.09 replaces YES with BYTE, NO with NONE, and adds the values WORD and BOTH.
DATASIZE 8
2-128 Specifies the data size, in bytes, that the BusCommand handler transfers. If this parameter is set to
a value other than the default (8 bytes), ensure that it matches the Scanner I/O data size specified
for the PLC.
Table 3-12. Fieldbus Menu Parameters
ALGOUT Menu
Parameter Choices Description
Table 3-11. Analog Output Menu Parameters
SCALES SERIAL FEATURE PFORMT SETPTS DIG I/O FLDBUS VERS
SWAP
NONE
BYTE
DATASIZE
8
data_size
If SWAP = YES
WORD
BOTH