Connection of purely serial encoders with EnDat22 interface to DRIVE-CLiQ
Encoder requirementsThe EIB 2391 S external interface box and the sensor module cabinet-mounted SMC40 both make it possible to connect encoders with the ordering designation EnDat22 to the DRIVE-CLiQ interface. The following encoder series are supported (with or without functional safety):
In principle, it is possible to connect further encoders featuring the EnDat22 interface depending, however, on the fi rmware level of the EIB or SMC and the subsequent electronics. Please contact HEIDENHAIN or the manufacturer of the subsequent electronics for further information. The following encoder series with the ordering designation EnDat22 cannot at present be connected to the DRIVE-CLiQ interface and therefore cannot be operated together with the EIB or SMC:
After switch-on, the EIB or SMC tests various characteristics of the connected encoder and automatically adapts itself to it. If the encoder does not fulfi ll the specifi c requirements, an error message is transmitted over the DRIVE-CLiQ interface.
Temperature sensor information The temperature information of an external temperature sensor connected with the EnDat encoder is transmitted by the EIB or SMC over the DRIVE-CLiQ interface. However, the value of the temperature sensor within the encoder is not transmitted. The EIB and SMC themselves have no separated input for a temperature sensor.
Functional safety The EIB or SMC can be used in safetyrelated applications only if the connected encoder supports functional safety. The characteristics regarding functional safety are substantially determined by the connected encoder and the subsequent electronics (if necessary, contact the manufacturer; the EIB or SMC essentially passes on the characteristics of the encoder).
The safe position is substantially determined by the connected encoder and the subsequent electronics. The EIB and SMC themselves do not infl uence the safe position. The “safe position” and “safetyrelated measuring step (SM)” data of the connected EnDat encoder are required for calculating the safe position. Please contact the manufacturer of the subsequent electronics for further information.
The PFH value of the total system (EIB 2391S or SMC40 + encoder) is the sum of the PFH values of the EIB or SMC and the connected encoder. For information on the encoder, please refer to its documentation (Product Information, Catalog, and Mounting Instructions).
Please contact the manufacturer of the subsequent electronics for more information on using the EIB or SMC and encoder in safety-related applications.
Restrictions For linear encoders with measuring lengths greater than approx. 50 m, there may be limitations on the output of the commutation angle over the DRIVE-CLiQ interface. There may also be limitations on saving a datum shift in the EnDat encoder. Please contact HEIDENHAIN in such cases.
DRIVE-CLiQ is a registered trademark of Siemens Aktiengesellschaft