Serial Communication Protocol; Table Of Commands; D.1 Table Of Commands - Siemens SITRANS RD200 Operating Instructions Manual

Serial communication protocol

SITRANS RD200 PDC
This section describes how to communicate with the SITRANS RD200 meter using the Serial
Communication Protocol (PDC). The user should be familiar with serial communications and
the meter. Refer to the instruction manuals for the meter and the serial communication
adapters for setup and wiring instructions.
Serial communications uses 8 data bits, 1 start bit and 1 stop bit. Data is standard 7-bit
ASCII, with the 8th bit ignored for received data and cleared for transmitted data.
Note that in this document, hex data is indicated by a "0x" prefix, ASCII characters are
shown with single quotes, as in '8' (= 0x38), and ASCII strings are shown with double
quotes, as in "SFT013".
To accommodate multiple devices sharing a common serial network (RS-485), there is a
programmable address code. The address code is selected from the front panel or via serial
command 38. Note that the address is required even for point-to-point configurations (RS-
232 and RS-422).
All data transfers are initiated by a request from the host computer and completed by a reply
from the meter. Multiple requests cannot be processed simultaneously. It is the responsibility
of the host to wait at least 500 milliseconds after completing a request before assuming that
the message was not received correctly.
D.1

Table of Commands

Command Code Description
10
11
12
F0
F1
30
31
32
19
20
21
22
23
23
26
27
SITRANS RD200
Operating Instructions, 05/2019, A5E47629414-AA
Read Process Value
Read Maximum Process Value
Read Minimum Process Value
Read Product Identifier
Read Firmware Version
Reset the Maximum Process Value
Reset the Minimum Process Value
Initialize Meter
Display Intensity
Input Selection Parameters
Lockout Code
Filter Value
Bypass Value
Adjustment Value
Relay Set and Reset Points
Relay Operating Parameters
D
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