Refer to Table 1 for information about the relation between the input channel status, Safety monitor output status, and drive output status.
Table 1. Safe Disable Input and External Device Monitor (EDM) Terminal Status
|
Input Channel Status
|
Input 1 (H1-HC)
|
ON (Close the circuit)
|
OFF (Open)
|
ON (Close the circuit)
|
OFF (Open)
|
|
Input 2 (H2-HC)
|
ON (Close the circuit)
|
ON (Close the circuit)
|
OFF (Open)
|
OFF (Open)
|
|
MFDO Terminal
(H2-xx = 21)
|
MFDO Terminal
(H2-xx = 21)
|
OFF
|
OFF
|
OFF
|
ON
|
|
MFDO Terminal
(H2-xx = 121)
|
ON
|
ON
|
ON
|
OFF
|
|
Drive Output Status
|
Baseblock (Drive ready)
|
Safety status (STo)
|
Safety status (STo)
|
Safety status (STo)
|
|
Keypad Display
|
Normally displayed
|
SToF (Flashing)
|
SToF (Flashing)
|
STo (Flashing)
|
|
LED Status Ring
|
Ready: Illuminated
|
ALM/ERR: Flashing
|
ALM/ERR: Flashing
|
Ready: Flashing
|
|
MEMOBUS Register
0020 (Hex.)
|
bit C: 0
bit D: 0
|
bit C: 1
bit D: 0
|
bit C: 1
bit D: 0
|
bit C: 0
bit D: 1
|
Safety Function Status Monitor
The drive Safety monitor output sends a feedback signal about the status of the Safety function. The Safety monitor output is one of the possible settings available for the MFDO terminals. If there is damage to the Safe Disable circuit, a controller (PLC or safety relay) must read this signal as an input signal to hold the “Safe Torque Off” status. This will help verify the condition of the safety circuit. Refer to the manual for the safety device for more information about the Safety function.
You can use the MFDO function settings to switch the polarity of the Safety monitor output signal. Refer to Table 1 for setting instructions.
Keypad Display
If the two input channels are OFF (Open), the keypad will flash STo [Safe Torque OFF].
If there is damage to the Safe disable circuit or the drive, the keypad will flash SToF [Safe Torque OFF Hardware] when one input channel is OFF (Open) and the other is ON (Close the circuit). When you use the Safe disable circuit correctly, the keypad will not show SToF.
If there is damage to the drive, the keypad will show SCF [Safety Circuit Fault] when the drive detects a fault in the Safe disable circuit. Refer to the chapter on Troubleshooting for more information.