diff --git a/docs/Driver.S7.Cli.md b/docs/Driver.S7.Cli.md
index a7b3eded..3a6e478c 100644
--- a/docs/Driver.S7.Cli.md
+++ b/docs/Driver.S7.Cli.md
@@ -4,7 +4,7 @@ Ad-hoc probe / read / write / subscribe tool for Siemens S7-300 / S7-400 /
 S7-1200 / S7-1500 (and compatible soft-PLCs) over S7comm / ISO-on-TCP port 102.
 Uses the **same** `S7Driver` the OtOpcUa server does (S7.Net under the hood).
 
-Fourth of four driver test-client CLIs.
+Fourth of six driver test-client CLIs.
 
 ## Build + run
 
@@ -58,6 +58,12 @@ otopcua-s7-cli probe -h 192.168.1.31 -c S7300 --slot 2 -a DB1.DBW0
 
 ### `read`
 
+Supported types: `Bool`, `Byte`, `Int16`, `UInt16`, `Int32`, `UInt32`, `Float32`.
+`Int64`, `UInt64`, `Float64`, `String`, and `DateTime` are defined in `S7DataType` but
+**not yet implemented** — the driver rejects them at initialisation and any read or write
+returns `BadNotSupported`
+(`src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.S7/S7Driver.cs` — `UnimplementedDataTypes` set).
+
 ```powershell
 # DB word
 otopcua-s7-cli read -h 192.168.1.30 -a DB1.DBW0 -t Int16
@@ -67,9 +73,6 @@ otopcua-s7-cli read -h 192.168.1.30 -a DB1.DBD4 -t Float32
 
 # Merker bit
 otopcua-s7-cli read -h 192.168.1.30 -a M0.0 -t Bool
-
-# 80-char S7 string
-otopcua-s7-cli read -h 192.168.1.30 -a DB10.STRING[0] -t String --string-length 80
 ```
 
 ### `write`