plc.yml in escalator-0.2.2

- old
+ new

@@ -1,7 +1,23 @@
-:plc:
-  :cpu: iq-r
-  :protocol: mc_protocol
-  :host: 192.168.0.1
-  :port: 5007
-  :program_area: d10000
-  :interaction_area: d9998
+# Run rake with target like this.
+#   > rake target=iq-r
+
+# plc section
+plc:
+  iq-r:                     # It's a target name
+    cpu: iq-r               # It's just a comment.
+    protocol: mc_protocol   # It's a protocol to communicate with PLC.
+    host: 192.168.0.10      # It's PLC's IP address or dns name.
+    port: 5007              # It's PLC's port no.
+
+  # You can describe targets multiply.
+  #
+  # plc2:
+  #   cpu: kv-5000
+  #   protocl: kv_protocol
+  #   ...
+
+# default section
+default:
+  # If you set target iq-r, `rake` is same as `rake target=iq-r`.
+  # default target is emulator.
+  # target: iq-r