Datasheet

172 Programmable Controllers
Simulate Specific Error Statuses for Debugging
The FAL(006) and FALS(007) instructions can be used to simulate a
desired error condition. This can be used, for example, to intentionally
create error conditions in the CPU Unit while debugging to check to
see if the correct error messages are displayed on a PT.
Example
Applicable Instructions:
Diagnostic Instructions
FAILURE ALARM (FAL(006))
SEVERE FAILURE ALARM (FALS(007))
Easily Program Logic Flow Control with Block
Programming Sections
A block of mnemonic programming instructions can be executed as a
group based on a single execution condition. IF/THEN, WAIT, TIMER
WAIT, and other instructions can be used inside the block program-
ming section to easily program logic flow control that is difficult to pro-
gram with ladder diagrams.
Applicable Instructions:
Block Programming instructions
Easily Handle Text Strings
Manufacturing instruction can be obtained from a host computer or
other external source, stored in memory, and then manipulated as text
strings (ASCII data) as required by the applications. The text strings
can be searched, fetched, reordered, or other processed in the CPU
Unit of the PLC.
Applicable Instructions:
Text String Processing instructions
Read Maintenance Information Easily through DeviceNet
(Unit Ver. 2.0 or Later) NEW!
Send user-set explicit messages easily without having to consider
FINS commands. Data transmission between PLCs can also be
achieved simply using explicit messages.
Applicable Instructions:
Network Instructions
EXPLICIT MESSAGE SEND (EXPLT(720))
EXPLICIT GET ATTRIBUTE (EGATR(721))
EXPLICIT SET ATTRIBUTE (ESATR(722))
EXPLICIT WORD READ (ECHRD(723))
EXPLICIT WORD WRITE (ECHWR(724))
PT
PT
FAL
(006)
Battery error
notification
FALS
(007)
Program error
notification
Battery
Error!
Program
Error!
Block programming section
Host computer
Text processing
in the CPU Unit.
Manufacturing
instructions in
text form.
POWER
PA205R
DC24V
AC240V
OUTPUT
RUN
INPUT
AC100-240V
L2/N
L1
CONTROLLER
CJ1G-CPU44
SYSMAC
PROGRAMMABLE
ERR/ALM
RUN
COMM
INH
PRPHL
OPEN
PERIPHERAL
BUSY
MCPWR
PORT
Explicit message instruction
No need to consider FINS commands.
DeviceNet
Y201-EN2-03.book Seite 172 Donnerstag, 30. März 2006 1:52 13