When the smart three-roll gate is in operation, it typically requires only one person to swipe their card once. However, there are instances where the three-roll gate may accidentally allow multiple cards to pass through at the same time. This can lead to security issues and operational inefficiencies. What could be causing this problem?
The smart three-roll gate is designed to read a single card at a time and allow passage accordingly. However, malfunctions often occur due to several key factors:
1) The signal from the user's card reader system to the gate controller may not be stable, leading to signal jitter—especially if the system uses a relay output type. In such cases, the gate might operate in a "read card memory" mode (P08 = 0), which can cause it to misinterpret multiple card reads.
To resolve this issue, consider the following solutions:
a) Change the gate’s operating mode to "read without card" mode. Refer to the appendix for detailed instructions on how to do this.
b) Introduce a 1-second delay in the control system’s signal output to ensure that each card is processed individually and correctly.
2) Another common cause is a faulty or weak resetting spring on the positioning arm. If the spring fails or lacks sufficient tension, the arm may not reset properly, leading to improper locking and allowing multiple users to pass at once.
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