Connect/Disconnect Function Of Sscnet Communication - Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual

Connect/disconnect function of SSCNET communication

Temporarily connect/disconnect of SSCNET communication is executed during Multiple CPU system's power supply ON. This
function is used to exchange the servo amplifiers or SSCNET cables. Set the request for the connect/disconnect of SSCNET
communication in "SSCNET control (command) (SD803)", and the status for the command accept waiting or execute waiting
is stored in "SSCNET control (status) (SD508)". Use this device to connect the servo amplifiers disconnected by this function.
When the power supply module of head axis of each SSCNET line (servo amplifier connected directly to the Motion CPU
module) turns OFF/ON, this function is not necessary.
• Servo amplifiers connected after the axis specified for SSCNET communication disconnect processing are
also disconnected. Confirm the LED display of the servo amplifier for "AA" after completion of SSCNET
communication disconnect processing. And then, turn OFF the servo amplifier's power supply.
• The "SSCNET control (status) (SD508)" only changes into the execute waiting status (-1) even if the
disconnect command of SSCNET communication (1 to 64) or connect command of SSCNET
communication (-10) is set in "SSCNET control (command) (SD803)". The actual processing is not
executed. Set the execute command (-2) in "SSCNET control (command) (SD803)" to execute.
• When the disconnect command of SSCNET communication (1 to 64) is set to axis not disconnect, the
"SSCNET control (status) (SD508)" returns the command accept waiting status (0) without entering the
execute waiting status (-1).
• Operation failure may occur in some axes if the servo amplifier's power supply is turned OFF without using
the disconnect function. Be sure to turn OFF the servo amplifier's power supply by the disconnect function.
• When the connect/disconnect command is executed to the axis allocated to B-axis and C-axis of MR-J4W-
B or B-axis of MR-J3W-B, it can be disconnected, however it cannot be reconnected. Execute the
connect/disconnect command to the A-axis.
• Only the release command of amplifier-less operation can be accepted during amplifier-less operation. The
connect/disconnect command cannot be accepted.
• If using the connect/disconnect function of SSCNET communication in a line used to perform driver
communication, connection/disconnection is only possible at the first axis (the servo amplifier directly
connected to Motion CPU). (Page 194 Precautions during control)
Procedure to connect/disconnect of SSCNET communication
Procedure to connect/disconnect at the exchange of servo amplifiers or SSCNET cables is shown below.
■Procedure to disconnect
1.
Set the axis No. to disconnect in "SSCNET control (command) (SD803)". (Setting value: 1 to 64)
2.
Check that "-1: Execute waiting" is set in "SSCNET control (status) (SD508)". (Disconnect execute waiting)
3.
Set "-2: Execute command" in "SSCNET control (command) (SD803)".
4.
Check that "0: Command accept waiting" is set in "SSCNET control (status) (SD508)". (Completion of disconnection)
5.
Turn OFF the servo amplifier's power supply after checking the LED display "AA" of servo amplifier to be disconnected.
SSCNET control (command)
(SD803)
SSCNET control (status)
(SD508)
5 FUNCTIONS USED WITH SSCNET COMMUNICATION
184
5.3 SSCNET Control Function
Disconnect command
(Axis No. of servo amplifier
to be disconnected)
0 1 to 64
0
Command accept Disconnect execute
waiting waiting
Disconnect execute
command
-2
Completion of connection
-1 -2
Disconnect processing
execute
Disconnect
command clear
0
0
Command accept
waiting