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R.T.A. s.r.l. – XPETME05 – 11/20 

28/29

 

 

 
12.10- 

EDM (ERROR DETECTION MONITOR) 

Error Detection Monitor output is a signal to monitor  problems in safe-torque-off circuit or between 
SAFETY  UNIT  and  STO1  and  STO2  inputs.  The  following  Table  10  shows  correspondences 
between STO1 and STO2 inputs and Monitor Output states. 

 

 

STO1 

STO2 

MONITOR OUT 

ON 

ON 

OFF 

ON 

OFF 

OFF 

OFF 

ON 

OFF 

OFF 

OFF 

ON 

 

Table 10 

 
12.11- 

EDM – CONNECTION EXAMPLE 

In Figure 17 is described  a connection  example that allows to enable  Safe Torque Off function by 
means of emergency stop button through SAFETY UNIT (Figure 17). 
Under normal conditions, pressing emergency stop button, STO1 and STO2 become OFF and EDM 
becomes ON (with maximum delay of 10 ms). When emergency stop button is released, if feedback 
circuit of SAFETY UNIT is reset and two safety inputs are set ON, EDM becomes OFF. This allows 
to restart the machine working. 
 

12.12- 

ERROR DETECTION METHOD 

Errors between input logic states and monitor output must be detected by means of SAFETY UNIT. 
For correct connections, please refer to the SAFETY UNIT manual. 
EDM (Error Detection Monitor) is not a safety output. Do not use EDM for any  purpose other than 
failure monitoring. 

 

12.13- 

 WARNING! 

VERIFICATION TEST 

Please verify that SAFE TORQUE OFF function properly works at every first machine start-up and at 
every drive replacement. 
Before  check  the  correct  working  of  SAFE  TORQUE  OFF  function,  please  verify  that  every  drive 
connections properly operate. 
Verification Test needs the following procedures: 
 
1.  Switch on the drive power supply. 
2.  Set ON both STO1 and STO2 inputs. 
3.  Verify that motor is in CURRENT ON state. 
4.  Verify corresponding EDM output state. 
5.  Set OFF both STO1 and STO2 inputs. 
6.  Verify that motor runs without holding torque and it is in CURRENT OFF state. 
7.  Verify corresponding EDM output state. 
8.  Repeat the points from 5 to 7 setting OFF STO1 and STO2 inputs separately. 

 

12.14- 

 WARNING! 

SAFETY CAUTIONS 

Please thoroughly observe the following safety cautions to use safe-torque-off function. 
Not correct use of safe-torque-off function can result to personal injury or death. 
 
1.  Safety system with safe-torque-off function must be designed by person with expertise of related 

safety standards and through understanding the descriptions specified in this manual. 

2.  The security system development that involves the use of STO function must be the result of an 

appropriate risk assessment. 

3.  When safe-torque-off function is active during the motor run, current motor is turned to zero and 

the motor continues to run due to inertia. Please design safety system so that no risks occur until 
the system stopped. 

4.  When  the  motor  is  used  in  vertical  axes,  the  motor  can  rotate  due  to  gravity.  Please  provide 

external device (i.e. brake) to stop the motor within requested range. 

Summary of Contents for X-PLUS ET B4 Series

Page 1: ...0 Internet http www rta it e mail info rta it R T A DEUTSCHLAND GmbH Bublitzer Stra e 34 40599 D SSELDORF Germany Tel 49 211 749 668 60 Fax 49 211 749 668 66 Internet http www rta deutschland de e mai...

Page 2: ...r RESPONSIBILITY to check that this manual refers to product model and version that will be used SYMBOL MEANING WARNING The section marked with this symbol contains warnings regarding safety problems...

Page 3: ...achine parts suitable to supply the drive in a correct way anti interference filter switches protection systems and in some cases transformer Standard drives are all models see chapter 3 for identific...

Page 4: ...an always be at customer disposal 1 8 The terms user and customer often used in this manual always indicate a skilled person as defined in chapter 2 7 1 9 INFORMATION This manual is considered valid a...

Page 5: ...National Electrical Code and any additional local code see Fig 7 chapter 7 The drive does not provide Motor Overload protection External or remote Motor Overload protection shall be provided in the en...

Page 6: ...considered liable for property losses equipment damages and personnel injuries arising from use or installation not fully compliant with specifications contained 2 13 For STO inputs and Monitor output...

Page 7: ...The models identification of X PLUS ET series drives is as follows X PLUS ET X4 Y where X can be B S with STO function Y is not present in standard models If present Y can be a number or an alphanumer...

Page 8: ...The outputs are considered ON when they are closed as regards to common of outputs 24 For each signal the correspondent terminals numbers of connector C2 are indicated 21 O2 O2 OUTPUT Auxiliary output...

Page 9: ...relay Output Vmax 45 Volt Imax 50 mA for other outputs Vsat 1 Volt Imax 5 mA for O0 output 3a 3b STO1 and STO2 inputs structure scheme MONITOR output structure DRIVE R2 R1 1W In Vin 24 Volt R1 3 3 KOH...

Page 10: ...setting of object 0x3210 For different motors with encoder please contact RTA 4 6 RJ 45 CONNECTORS EtherCAT communication Two standard Ethernet RJ 45 modular connectors IN OUT are provided for the Eth...

Page 11: ...arth terminal screw is in frontal panel inferior part and has to be electrically connected to earth PE terminal of the machine in which the drive is installed The terminal 6 of C1 connector has to be...

Page 12: ...tes nominal alternating voltage for drive operation with not stabilized power supply LVDC nom value of logic continue voltage at which the drive can be supplied Max input current maximum input current...

Page 13: ...hey can be set with proper commands see programmer s manual suitable to adapt drive characteristics to the specific motor and or application Do not forget to do these settings wrong setting could get...

Page 14: ...to one of the following protection a Thermal protection if LED TER is ON b Max or Min supply voltage if LED HV is OFF c Short circuit or wrong motor connection if LED HV is ON and LED TER is OFF OFF...

Page 15: ...of the data is recommended To get more accurate information contact R T A describing all the data of the particular application 7 2 WARNING Protection systems indicated in Fig 7 must include SPD Surge...

Page 16: ...l XPETME05 11 20 16 29 Note C3b connector is not available in X PLUS ET B4 Fig 7 Drive external connections scheme Note For connection drive encoder use twisted pair shielded cable EI and EI EB and EB...

Page 17: ...these conditions suitable conditioning systems have to be provided for the enclosure 8 3 Storage environment in original enclosure Temperature from 25 C to 55 C Relative humidity from 5 to 95 Environ...

Page 18: ...be used with STO1 STO2 inputs and MONITOR output X PLUS ET SERIES DRIVE OUTPUT V CONTROL SYSTEM PNP INPUT CONTROL SYSTEM NPN INPUT X PLUS ET SERIES DRIVE OUTPUT V V 45 Volt Fig 8 Interfacing a X PLUS...

Page 19: ...RIES DRIVE INPUT V 8 VDC V 24 VDC Fig 11 Driving a X PLUS ET logic input from a control system with a PNP output CONTROL SYSTEM V OUTPUT INPUT GND OUTPUT X PLUS ET SERIES DRIVE 8 VDC V 24 VDC Fig 12 C...

Page 20: ...ires the exceeding of this limit please contact RTA Connect earth line to motor chassis To reduce the radio frequency emissions the mechanical connection of motor to machine chassis by means of mounti...

Page 21: ...e achieved 11 1 4 In some cases due to the characteristics of particular installations conflicts between ground connections necessary for shielding purposes and ground connections necessary for safety...

Page 22: ...less exploitation of motor characteristics and or greater acoustical noise Anyhow we recommend to contact R T A in case you need to exceed such limits DRIVE TYPE PHASE INDUCTANCE SUGGESTED LIMITS mH 1...

Page 23: ...following two cases Drive current is set to a value greater than nominal motor current Application working conditions are near to the thermal limits of the motor see sec 11 5 11 5 MOTOR LOSSES AND HEA...

Page 24: ...ntly block the motor current 12 3 STO FUNCTION SCHEME DESCRIPTION STO function disables the current flowing into motor windings Each of two STO1 and STO2 channels act independently to shut down motor...

Page 25: ...n properly works before machine use at first machine start up and at every drive replacement If input output signals are not used correctly the STO function doesn t work properly and dangerous situati...

Page 26: ...7 Volt H 0 Volt Vin 3 Volt L DRIVE Out 22 Vmax 45 Volt Imax 50 mA Vsat 0 8 Volt at 10 mA Out 24 NOTE Insert a protection diode in parallel with the load in case of inductive load 15a 165b Fig 16 Input...

Page 27: ...TY DEVICE SELF DIAGNOSIS In case of the safety device perform self diagnosis through input off shot pulses the input off shot pulse must have a maximum duration of 1 ms STO function is not activated w...

Page 28: ...start up and at every drive replacement Before check the correct working of SAFE TORQUE OFF function please verify that every drive connections properly operate Verification Test needs the following p...

Page 29: ...ical angle 1 50 of a turn and then remain a stable position It is necessary to verify that this limited movement does not correspond to some risky conditions 6 Be sure that SAFE TORQUE OFF function pr...

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