ELCA E1 Series - Risk Analysis for Remote-Controlled Machines; Delay in the Command Response Time

ENG
ELCA
Safety warnings
17
7.2 Risk analysis for remote-controlled Machines
The Manufacturer of the Machine on which you intend to install the
Radio Remote Control and its designers need to carry out a careful and
in-depth risk assessment to determine whether the Elca radio remote
control is suitable for the safe and efcient use of the Machine, taking
into account the conditions of use and the intended uses, and that the
installation, maintenance and use of the Elca radio remote control and
all its components are carried out only and entirely in accordance with
this Manual and in compliance with all local safety rules, standards and
regulations (referred to herein as "Laws, Regulations and Standards").
In carrying out the risk analysis to establish whether the Radio Remote
Control can be installed on a Machine, the Manufacturer of the Machine
and/or the Installer of the Radio Remote Control must respect all Laws,
Regulations and Standards, also local, regarding the assessment of the
risks and the safety of the Machine and the following recommendations:
- some Machines cannot be tted with a Radio Remote Control, as
established in paragraph 8.6). Also all the other circumstances that
might limit, impede or impose conditions for the use of a Radio
Remote Control on the Machine, or which could effect it being used
correctly and safely should be evaluated.
- The radio link between the two Units can be interrupted (see
paragraph 8.2.3Description of the radio link).
- all the information regarding the installation, use and maintenance
supplied by Elca should be taken into consideration (see paragraph
8.6, paragraph 9.2 and paragraph 13.1 ).
- there is a delay between the release of a command in the Transmitting
Unit and the deactivation of the relative output in the Receiving
Unit (see paragraph 7.3).
- there is a delay between the activation of a command in the
Transmitting Unit and the activation of the relative output in the
Receiving Unit (see paragraph 7.3).
- additional measures might be needed to protect the actuators (see
paragraph 7.4).
- it is possible that a command is activated or deactivated because
of electrical and/or mechanical faults.
7.3 Delay in the command response time
In normal conditions, the delay between the activation
of a command in the Transmitting Unit and the activation
of the relative output in the Receiving Unit requires a
time equal to the "Command response time" (typical)"
indicated in the Technical Data (see paragraph 8.3).
In situations where there is a poor quality radio link
(for example: interference, range of action reached)
this delay can extend up to the "Maximum stop time"
indicated in the Technical Data (see paragraph 8.3).
It should be remembered that due to the characteristics
of the radio medium (for example: interference, range
of action reached), the delay between the release of a
command in the Transmitting Unit and the deactivation
of the relative output in the Receiving Unit can extend up
to the "Maximum stop time" indicated in the Technical
Data (see paragraph 8.3).