
Modbus Poll
Modbus TCP/RTU Master & Slave
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$24.99
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About
Modbus Poll reads, writes and simulates Modbus TCP devices from your iPhone or iPad. Connect to a PLC, power meter, drive or inverter on your network and watch every register update live.
MASTER
• Modbus TCP
• Read coils, discrete inputs, input registers and holding registers
• Write single and multiple coils and holding registers
• Data types: INT16, UINT16, INT32, FLOAT32 and FLOAT64
• Word order AB CD, CD AB or BA DC; decimal, hex or binary display; 0- or 1-based addresses
• Several read blocks per device, polled together
• Modbus exception codes shown on the rows they affect
SLAVE SIMULATOR
• Run a Modbus TCP slave on your device
• Device templates with live, changing values: Schneider Electric PM5560, SMA STP 60-US-10, Endress+Hauser Promag 10W, ABB AZL402, Emerson Daniel 1000 and a Raritan PDU
• Lock a register to hold its value while the rest keep changing
DIAGNOSTICS
• Traffic log with every request and response decoded
• Live trend chart for any register
• Scan a subnet for devices listening on port 502
• Saved connection profiles
Modbus TCP only: RTU and RS-485 serial are available in the Mac version.
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What's New in Modbus Poll
1.3.5
November 2, 2026
2
Subscriptions & In-App Purchases
Voltrus Connect Monthly
Profile sync, teams, Remote sites. Billed monthly.
$4.991 Month




