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--- plc:plc_modbus_api [2019/07/29 11:42] – ivan
+++ plc:plc_modbus_api [2019/07/29 13:11] – ivan
@@ Line 90: / Line 90: @@
 };</code>
+Note that the commands to read multiple coils (the //in// variable) will not work for a Modbus device that can only write (outputs only). Similarly, the write commands will not work on a Modbus device with inputs only, such as the WP8026ADAM. Below is a list of available Modbus devices and their capabilities:
+^ Device ^ Description ^
+| WP8028ADAM| 8 digital inputs, 8 digital outputs |
+| WP8027ADAM | 16 digital outputs, 0 inputs (write-only) |
+| WP8026ADAM | 16 digital inputs, 0 outputs (read-only) |
+| WP8025ADAM | 8 relay outputs (normally open) |
+| WP9038ADAM | 6 analog inputs, 4 digital inputs, 4 digital outputs. The digital inputs/outputs work similarly to the WP8028 |
 Modbus Scheduler in myCNC has 4 messages queue. Up to 4 registers can be written immediately from PLC procedure. Modbus manager will send it one-by-one and will be waiting a reply from Modbus device after each message.
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 configuration dialog </code>
-{{ mycnc:mycnc-spindle-modbus-001.png?900 }}
+{{:plc:modbus-plc-002-spindle.png}}