Safety Stop Function - Mitsubishi Electric 700 Series Instruction Manual

Control circuit specifications
2.3.4

Safety stop function

(1) Description of the function
The terminals related to the safety stop function are shown below.
Terminal Symbol
S1 For input of safety stop channel 1.
∗1
S2 ∗1 For input of safety stop channel 2.
PC ∗1 Common terminal for terminal S1 and S2.
Outputs when an alarm or failure is detected.
Y0 (SAFE2 signal)
The signal is output when no internal safety circuit failure
SE Common terminal for open collector outputs (terminal Y0)
∗1
In the initial status, terminal S1 and S2 are shorted with terminal PC by shortening wire. Remove the shortening wire and connect the safety relay module
when using the safety stop function.
∗2
At an internal safety circuit failure, one of E.SAF, E.6, E.7, and E.CPU is displayed on the operation panel.
......Specifications differ according to the date assembled. Refer to page 232 to check the SERIAL number.
NOTE
Hold the ON or OFF status for 2ms or longer to input signal to terminal S1 or S2. Signal input shorter than 2ms is not recognized.
SAFE2 signal can only be used to output an alarm or to prevent restart of an inverter. The signal cannot be used as
safety stop input signal to other devices.
(2) Wiring connection diagram
To prevent restart at fault occurrence, connect terminals Y0 (SAFE2 signal) and SE to terminals XS0 and XS1, which are
the feedback input terminals of the safety relay module. Terminal Y0 is turned OFF at a fault occurrence.
START/RESET
Emergency
stop button
COM0
X0
+24V
Internal
DC24V
Safety
Circuit
24G
MITSUBISHI MELSEC Safety relay module
QS90SR2SN-Q
(3) Safety stop function operation
Input signal
Input power
S1-PC
OFF -- ---
Short
ON Open
Short
Open
∗1
At an internal safety circuit failure, one of E.SAF, E.6, E.7, and E.CPU is displayed on the operation panel.
∗2
SA is displayed when both of the S1 and S2 signals are in open status and no internal safety circuit failure exists.
∗3
ON: Transistor used for an open collector output is conducted.
OFF: Transistor used for an open collector output is not conducted.
For more details, refer to the Safety stop function instruction manual (BCN-A211508-004). (Refer to the front cover of the Instruction
Manual (Basic) for how to obtain the manual.)
24
COM1
X1 XS0 XS1 Z00 Z10 Z20
K1
K2
Z01 Z11 Z21
Internal safety
circuit ∗1
S2-PC
-- --- -----
No failure
Short
Detected
No failure
∗2
Open
Detected
Open Detected
Short Detected
Description
Between S1 and PC / S2 and PC
Open: In safety stop state.
Short: Other than safety stop state.
OFF: Internal safety circuit failure.
∗2 exists. ON : No internal safety circuit failure.
Inverter
Y0(SAFE2)
SE
PC
I/O control
S1
Output shutoff
S2
circuit
Output signal (SAFE2) ∗3
OFF
ON
OFF
ON
OFF
OFF
OFF
∗2
∗2
R S T
U V W
IM
Operation state
Output shutoff (Safe state)
Drive enabled
Output shutoff (Safe state)
Output shutoff (Safe state)
Output shutoff (Safe state)
Output shutoff (Safe state)
Output shutoff (Safe state)