Jinan USR IOT Technology Limited IO808 사용자 설명서
USR-IO808-EWR User Manual
Technical Support:
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Jinan USR IOT Technology Limited
www.usriot.com
12
No button will return: 11 03 02 00 00 79 87
Have button will return: 11 03 02 FF 00 38 77
Have button will return: 11 03 02 FF 00 38 77
2.1.3. Pulse counting
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Register address range: 64~71(0x0040~0x0047)
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Supported function code: 03(Read holding register), 04(Read input register)
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Connection: Default is dry contact input. Short-circuit DI and COM will change input status. If user needs wet
contact input can contact to our sales personnel
contact input can contact to our sales personnel
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Pulse counting: Default status is 0, short-circuit DI and COM and then release will count 1. Detection method:
Read pulse counting register value by 03 function code of Modbus protocol. Maximum value of pulse counting
is 65535 and it will restart counting after exceeding 65535. Can’t reset count to 0 and restart product won’t
save count.
Read pulse counting register value by 03 function code of Modbus protocol. Maximum value of pulse counting
is 65535 and it will restart counting after exceeding 65535. Can’t reset count to 0 and restart product won’t
save count.
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Note
: Pulse counting won’t filter input waveform and all pulse in the range of detection will be recorded. So
input waveform should keep stable to ensure accurate count.
Example:
Detect count of the first way, send: 11 03 00 40 00 01 87 4E
Return: 11 03 02 00 00 79 87
2.2. DO output
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Register address range: 00~07(0x0000~0x0007)
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Supported function code: 01(Read coil), 05(Write single coil), 0F(Write multiple coil)
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Connection: DO output is Relay passive output. Don’t power the coil, Relay COM and NC will close, COM and
NO will open. After powering, the contrary is the case.
NO will open. After powering, the contrary is the case.
Take the first way Relay control as example:
Query: 11 01 00 00 00 04 3F 59
Control to close: 11 05 00 00 FF 00 8E AA
Control to disconnect: 11 05 00 00 00 00 CF 5A
2.3. Work mode
Default work mode of USR-IO808-EWR is slave mode. IO808-EWR will be slave both on network side and RS485
side and IO808-EWR will discard data if IO808-EWR receives data not for IO808-EWR local address.
side and IO808-EWR will discard data if IO808-EWR receives data not for IO808-EWR local address.
2.3.1. Master mode
Master mode data flow diagram and connecting to network diagram as follows: