Preserve separate Modbus phase timeouts

[onehouse] / doc / m31.rst

diff --git a/doc/m31.rst b/doc/m31.rst
index 64c913c6312b4e4fb3b5f8bfe690555071f14bc8..b0305e346d0131f7b048553666a695c89d404b16 100644 (file)
--- a/doc/m31.rst
+++ b/doc/m31.rst
@@ -33,10 +33,10 @@ load. The conservative sixteen-module limit includes the host.
 ***************
 
 ``NewTCPClient`` supplies a caller-owned, serialized connection through
-``Client``. Connect selects the configured unit and has a two-second
-timeout. A request has a one-second write deadline and a two-second
-response deadline, both measured from its start. Caller deadlines and
-cancellation can stop it earlier. Each response must match the
+``Client``. Connect selects the configured unit and has a one-second
+timeout. Each write has a one-second deadline. Each response has a
+two-second deadline measured after the request write. Caller deadlines
+and cancellation can stop it earlier. Each response must match the
 transaction, unit, function, length, and write acknowledgement.
 Supported functions are 01, 02, 03, 05, 15, and 16. No external Modbus
 package is required.