Xenus Plus Compact STO Manual
16-01553 Rev 00
Copley Controls
Page 26 of 31
7.4
Troubleshooting
The status of the STO function in the
Xenus Plus Compact
drive can be viewed via LED indicators on the drive,
data objects accessible over CANopen, EtherCAT, and the configuration software CME2.
Other Copley software products such as CMO (Copley Motion Objects), CML (Copley Motion Libraries),
CPL (Copley Programming Language) and ASCII communications can read the status of the STO function.
The LED indicators and data parameters are not part of the drive safety function. They are informational
only, and cannot be relied upon for any safety related functions of the user.
7.4.1 How to tell if the STO function is active
The voltage to one or both of the STO channels in the drive is < 6 Vdc, or open.
The Amp LED on J8 double-flashes green, then pauses.
This pattern repeats when the STO function is active.
Bit 0 OR bit 1 of ASCII parameter 0x139 (DS-402 0x219D) is set (1).
The Safety LED on the CME2 Control Panel is red when the STO function is active.
For both EtherCAT and CANopen models, Bit 2 of the CANopen Status Word 0x6041 is zero, indicating
a hardware-disabled state. This bit is controlled by any input that is programmed for the Enable function,
and by the STO function. When bit is zero, then it is necessary to check 0x219D (ASCII 0x139) to see if
bit 0 or bit 1 is set (1). If this condition is true, then the STO function is active.
7.4.2 How to tell if the STO function is inactive
The voltage applied to both STO inputs of the drive is ≥ 15 Vdc.
The Amp LED on J8 is solid green or slow-blinking green.
Bit 0 AND bit 1 of ASCII parameter 0x139 (DS-402 0x219D) are zero.
The Safety LED on the CME2 Control Panel is green when the STO function is inactive.
For the EtherCAT and CANopen models, Bit 2 of the CANopen Status Word is set(1), indicating a
hardware-enabled state. The drive cannot be hardware-enabled until all inputs programmed as Enable
inputs are true AND the bits 0 AND bit t in the STO function status parameter (0x219D) are zero.
7.4.3
Why can’t the STO function be deactivated?
The voltage between STO-IN1(+) and STO-IN1(-) is < 15 Vdc OR the voltage between STO-IN2(+) and
STO-IN2(-
) is < 15 Vdc. Both of these voltages must be ≥ 15 Vdc to deactivate the STO function
7.4.4
Why can’t the STO function be activated?
The voltage between STO-IN1(+) and STO-IN1(-) is > 6 Vdc AND the voltage between STO-IN2(+) and
STO-IN2(-) is > 6 Vdc. One or both of these voltages must be < 6.0 Vdc or the to activate the STO
function
7.4.5 The drive is hardware-
enabled but the motors don’t move.
The STO function may be active. Check the Amp LED to see if it is double-flashing green.
If so, then the STO function is active. If not, check the Amp LED blink patterns for indications of other
faults or conditions that may inhibit motion.
