Mitsubishi Electric MELSEC iQ-R Series User Manual page 160

Remote password check processing performed by C24
■Communication in which a remote password check is performed
 When the following parameters are set for the C24 mounted on the host station CPU module, the C24 performs a remote
password check for communication requests listed below.
• When a remote password is set in the CPU module.
• When C24 that is communicating data with the target device has been set as a module subject to the remote password
check.
 C24 performs a remote password check with respect to a communication request to the host station/other station received
from the target device.
 C24 does not perform a remote password check for the following communication requests.
• Transmission request from the CPU module on the host station (such as transmission using nonprocedural protocol)
• Communication request from the target device (including Engineering tool connected to the CPU module on the host
station) transmitted to other station upon request from the CPU module.
Ô
Engineering tool
*1 In the above figure, a communication request from the target device cannot be received since the remote password check setting has
been configured.
If the remote password check setting has not been configured, a communication request can be received and data communication from
the target device is possible.
■Selecting modules to which remote password check is performed
C24 to which the remote password check is performed can be selected by the user, and it will be set by the parameters of the
CPU module.
(This is set on the "Remote Password Setting" screen of Engineering tool.)
7 COMMUNICATIONS BY THE MODEM FUNCTION
158
7.3 Specifications of Modem Function
Modem
CPU module C24
Remote password Remote password
check
(Host station)
(Other station)
Ethernet module
Ò
Ó
Ô
CPU module
Remote
Remote password
check
password
(*1)
Ethernet module
Modem
Path for items subject
to remote password check
Path for items not subject
to remote password check