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Q
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Can power be switched to APAX-557x off at any time without damage?
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A
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When you enable the EWF (Enhanced Writer Filter) function, there won’t be damage to power off APAX-557x at any time. Otherwise, we recommend to power off APAX-557x after you shut down the operating system by software.
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Q
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Can power be switched to APAX-5520 off at any time without damage?
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A
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There is no problem to power off APAX-5520 at any time. Once the power is back, the system will boot up again.
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Q
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How many serial ports I can use on APAX-557x?
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A
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One RS-232 with DB9 interface and one RS-422/485 with screw terminal block interface.
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Q
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How many serial ports I can use on APAX-5520?
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A
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One RS-485 with clamp terminal block interface is available.
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Q
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Is it possible to use APAX-5000 I/O module through APAX utility from a remote PC?
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A
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Yes, you can do this using APAX coupler.
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Q
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When I already offer power supply to APAX-557x, do I need another power supply for the following APAX-5000 I/O modules?
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A
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The power will be transferred from APAX-557x to the stacked APAX-5000 I/O modules through the backplanes. So if the power is enough for the whole system, you don’t need to add extra power to the APAX-5000 I/O modules.
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Q
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When I insert APAX-5520 on APXA-557x, how does the APAX-557x communicate with APAX-557x?
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A
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The first way is to leverage the two connected internal COM ports of APAX-557x and APAX-5520. The two modules can communicate with each other by Modbus/RTU protocol. The second way is to use the external LAN port or RS-485 port of APAX-557x and APAX-5520 with extra wiring. The two modules can communicate with each other by Modbus/RTU or Modbus/TCP protocol.
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Q
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When APAX-5000 I/O modules located in different place from the controller, could it possible to remain the real-time performance?
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A
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Yes. APAX offer one expansion port on the backplane. Connecting different backplanes together with standard Ethernet cable and insert APAX-5000 I/O modules and controller on these backplane makes
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Q
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What is the distance limitation between two backplanes?
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A
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It’s 100 m with standard industrial Ethernet cable. However, the expansion distance can be longer if standard unmanaged Ethernet switch is used.
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Q
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Why we cannot use managed Ethernet switch for expansion between two backplanes?
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A
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The managed Ethernet switch will influence the I/O local bus real-time performance.
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Q
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If there is surge attacking APAX-5000 I/O module, will the control system be broken?
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A
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No, there is isolation protection between the I/O channels and the backplane. (2500 VDC)
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Q
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Does APAX-5000 I/O modules offer channel-to-channel isolation?
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A
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No, we don’t support channel-to-channel isolation yet.
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Q
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What ESD level and condition is acceptable for APAX series?
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A
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APAX series will pass international standard CE certification which involves ESD testing (according to IEC-61000-4-2, it meets the requirement of performance criterion A). It will perform contact discharge with 4 kV discharge voltage and air discharge with 8 kV discharge voltage.
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Q
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When the whole APAX system is running, is it possible to change I/O modules without shutting the system?
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A
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No problem. APAX I/O module itself supports hot swap function, so it can be added to or removed from the system without shutting the system. And KW software can support on-line programming download. So you can insert a new module to the system, and then download new program with the new hardware setting to the controller.
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Q
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Dose APAX I/O module support wire burnout detection?
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A
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APAX analog input module supports wire burnout function for specific input range. Refer to table below for more detail.
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Module
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Which range supports wire burnout detection
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APAX-5013
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RTD (all type)
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APAX-5017
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Current (4~20 mA)
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Current (4~20 mA)
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Current (4~20 mA) and Thermocouple (all type)
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Q
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If I connect two power supplies to two APAX-5002 backplanes which are connected together, will the voltage difference damage the system?
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A
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No, there are special-designed electric circuits on the backplane which can prevent it.
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Q
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What is the maximum number of the APAX I/O modules used in one system?
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A
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Up to 32 I/O modules can exist in one system. (Maximum 16 analog modules)
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Q
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Is it possible that I don’t write any program but I want to control the APAX I/O modules on APAX-5570XPE or APAX-5571XPE with HMI/SCADA software?
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A
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Yes, there is built-in Modbus server on APAX-5570XPE/5571XPE. Any HMI/SCADA software supports Modbus/TCP client can access the APAX I/O modules directly without any extra programming.
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Q
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Can I use two APAX controllers for redundancy system?
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A
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APAX controller currently supports backup function. Two controllers are equipped with the same control program. At first, the master controller will run the control program. The backup controller will take the control responsibility (run control program) when the master controller crashes. We are developing the redundancy ability and will release soon. The difference between backup and redundancy lies in two aspects:
- For backup: When the master controller dies, another controller will restart the control process.
For redundancy: When the master controller dies, another controller will continue the control process.
- For backup: The database won’t be exchanged between the two controllers.
For redundancy: The database will be exchanged between the two controllers.
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Q
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Does KW programming software support I/O simulation function?
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A
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Yes, it supports.
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Q
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What is the maximum size of SD card I can use on APAX-5570XPE or APAX-5571XPE
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A
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16 GB.
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Q
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What is the maximum size of CF card I can use on APAX-5520?
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A
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1 GB. (FAT)
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