diff --git a/source/_components/modbus.markdown b/source/_components/modbus.markdown
index fe3ffbbcd79d..6ed59bbed9e2 100644
--- a/source/_components/modbus.markdown
+++ b/source/_components/modbus.markdown
@@ -149,7 +149,7 @@ modbus:
 | hub       | Hub name (defaults to 'default' when omitted) |
 | unit      | Slave address (set to 255 you talk to Modbus via TCP) |
 | address   | Address of the Register (e.g., 138) |
-| value     | An array of 16-bit values. Might need reverse ordering. E.g., to set 0x0004 you might need to set `[4,0]` |
+| value     | A single value or an array of 16-bit values. Single value will call modbus function code 6. Array will call modbus function code 16. Array might need reverse ordering. E.g., to set 0x0004 you might need to set `[4,0]` |
 
 ## {% linkable_title Building on top of Modbus %}