IDEC SE2L-H05LPC, Руководство пользователя

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SE2L User’s Manual (SE9Z-B1865)
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3.11 Area sequence function
Area sequence is a function to monitor sequences of area switching. When this function is activated,
OSSD signal will switch to OFF-state if the switching pattern is other than the configured sequence. This
function prevents the machine to operate with random protection zone.
From each area, switching selection to maximum 31 other areas is possible when configuring the area
sequence. And, it is necessary to specify 1 or more areas to avoid error.
<Area switching sequence>
When area sequence is disabled, SE2L can switch from an area to any other areas (Figure 3-24 (a) whereas
it can only switch to specified areas if area sequence is enabled. (Figure 3-24 (b)).
Area sequence function is recommended for control systems where switching area sequences can be
configured.
Figure 3-24 (a) Operation without area sequence Figure 3-24 (b) Operation with area sequence
3.12 Response time
Response times of OSSD signal (Figure 3-25), OFF response time (Default 60ms) and ON response
time (Default 270ms) are configurable individually for each area using the SLS Project Designer. Response
time of the Warning 1 and Warning 2 will be same as the OSSD response time. Table 3-4 shows the possible
configurable values. In the dual protection mode, it is possible to set a separate response time for each
protection area.
When longer response time is configured, the stability of SE2L can be increased. However, longer
response time requires longer safety distance. (Refer to chapter 4). User must perform risk assessment before
configuring the response time. Addition of maximum 1 cycle (30ms) has to be taken into account for the area
switching.
Figure 3-25 Response time