GFT 19.0 Control System

The electronic control and diagnostic system GFT 19.0 was developed for error detection of escalators in stores and in standard traffic installations.

Retrofitting

To make the retrofitting of existing systems easier the control system was equipped with plugs which fully fulfil any provisions of the category 4 according to EN 954-1 PL e, according to ISO 13849-1, SILCL 3, according to EN IEC 62061, EN IEC 61508 and to DIN 151-1 (safety of escalators and moving walks).

Safety

Converting the fuse circuits to 24V DC lead to a maximum of safety. Any safety related contacts are observed individually and, in case of a failure, locked and switched off.

Diagnosis

Faults are indicated on a central display of the control system in plain text. Any occurring faults are shown within intervals of four (4) seconds.

Settable Parameters

Lubrication pulse and pause can be set and changed at any time during normal operation. This is also possible during run time (basic running time, counter operation, fast operation, after-running time of brake).

The control version which controls the motor's star / delta operation is equipped with a passenger counter. If direction "up" was selected and there are more than 13 persons on the escalator operation is switched to delta operation.

To observe the handrails and the rotational speed three wire technology is used. Beside the display of braking distance, temperature acquisition and temperature evaluation the detection of asymmetrical operation is performed by the separately available evaluation device. The control system allows connecting of a system which allows to resume the normal operation (WBS = Wiederbereitschaftsschaltung (automatic restart system)). To use it, the safety circuit has to be closed before the emergency stop occurs and the system has to switched to on (traffic light switched to green).