Mitsubishi Electric M800VW Series Manual page 632

M800V/M80V Series PLC Development Manual
9 Appendix 3: PLC Function
9.1 Enhanced PLC Security Mode
Limitations of E/U project
There are certain limitations on the use of instructions and PLC devices in an E/U program because of the configuration of the
built-in PLC in the E/U mode.
Similar limitations on devices apply to the input/output of values between the devices in the E/U project and PLC on-board or
GX Developer/GX Works2.
Note that there are also limitations on the application functions that are available for connections with the E/U project in order
to prevent end users from modifying the data and the setting of MTB projects.
The following describes these limitations.
 Limitations on instructions
The following instructions cannot be used in an E/U program.
BMOV(P), FMOV(P), DECO(P), DSFR(P), DSFL(P), S.ROT, S.ATC, G(P).RIRD, G(P).RIWT, Z(P).REMFR, Z(P).REMTO
A sequence program containing these instructions cannot be written to the E/U project. If a sequence program with these
instructions has already been written before the E/U project is set, the program can be read from the E/U project to
applications, but when you attempt to execute the sequence program, PLC STOP applies and the alarm "U10 Illegal PLC" is
issued.
 Limitations on devices
The limitations on devices for an E/U program are listed in the following table. Note that write operations to the devices
through index modification are inhibited, while read operations of device values through index modification are allowed for an
E/U program.
The listed limitations also apply to the device input/output between the E/U project and PLC on-board or GX Developer/GX
Works2.
Category Device
Common device X, Y, F, R, ZR
Independent device
L, B, V, T, ST, C, W Can be input/output
(variable)
Independent device
SM, SD, Z
(fixed)
Independent device
N, P
(fixed)
Common/independent
device (independent ar- M, D, SB, SW
ea)
Common/independent
M, D, SB, SW
device (common area)
Sequence programs not in line with these limitations on devices cannot be written to the E/U project. If a sequence program
which does not follow these limitations has already been written before the E/U project is set, the program can be read from
the E/U project to applications, but when you attempt to execute the sequence program, PLC STOP applies and the alarm
"U10 Illegal PLC" is issued.
Outputting a range including both ranges that can be output and cannot be output, and a range including both ranges of
common and independent devices are treated to be not in line with the limitations on devices.
For details of which arguments of the available instructions in the built-in PLC are output, refer to "PLC Programming Manual".
 Limitations on functions
Formatting from PLC on-board and GX Developer/GX Works2 is not possible while connected to the E/U project. It is also
impossible to modify multi-project parameters from PLC on-board.
These limitations prevent end users from deleting MTB programs and modifying MTB project settings.
For details on the functions available for the E/U project, refer to "9.1.1.6 Functions Available in Each Mode".
Limitations on device Number of devices
Can be input/only part
Fixed
of Y can be output
Can be set via multi-
project parameter
Can be input/output Fixed
Can be input/cannot be
Fixed
output
Can be set via multi-
Can be input/output
project parameter
Can be input/only part
Can be set via multi-
of M and D can be out-
project parameter
put
607
Range of output from end
user
Output range of Y can be set
via NC parameters
Fixed (all devices can be out-
put)
Fixed (all devices can be out-
put)
Fixed (none of devices can
be output)
Fixed (all devices can be out-
put)
Output range of M and D can
be set via NC parameters
IB-1501614-B