Serial Communications; Inputs - Siemens SITRANS RD200 Operating Instructions Manual

Specifications

2.7 Serial Communications

2.7 Serial Communications
Note
The RD200 does not support 8N1. It will be fixed to 8N2 when parity setting "None" is
selected.
Connections
Setup
Software
Refer to Serial communication protocol (Page 62) and Modbus register tables (Page 81) for
details.
2.8

Inputs

Process (field selectable)
Temperature (field selectable)
Accuracy Process
Thermocouple tem-
perature
RTD temperature
8
PDC standard
•
RS-232 or RS-422/485 running Modbus® RTU and ASCII via RJ-11 connector
•
Meter address
•
•
Baud rate
•
Transmit time delay Programmable between 0 and 199 ms or transmitter al-
ways on for RS-422 communication
Data 8 bit (1 start bit, 1 stop bit)
Parity None, even, odd (Modbus only; PDC protocol does not
use parity)
Byte-to-Byte timeout 0.01 to 2.54 sec (Modbus only)
Turn around delay Less than 2 ms (fixed)
SITRANS RD Software
±20 mA DC (4 to 20 mA, 0 to 20 mA)
•
±10 V DC (1 to 5 V, 0 to 5 V, 0 to 10 V)
•
Thermocouple temperature:Type J, K, E, T, Type T using 0.1° display resolu-
•
tion
RTD temperature:100 Ω RTD
•
±0.05% of span ±1 count, square root: 10 to 100% FS
•
Type J: ±1 °C in range -50 to +750 °C (±2 °F in range -58 to +1382 °F)
•
Type K: ±1 °C in range -50 to +1260 °C (±2 °F in range -58 to +2300 °F)
•
Type E: ±1 °C in range -50 to +870 °C (±2 °F in range -58 to +1578 °F)
•
Type T: ±1 °C in range -180 to +371 °C (±2 °F in range -292 to +700 °F)
•
Type T, 0.1 °Res: ±1 °C in range -180.0 to +371 °C (±1.8 °F in range -199.9
•
to+700 °F)
100 Ω RTD: ±1 °C in range -200 to +750 °C (±1 °F in range -328 to +1382 °F)
PDC protocol: 0 to 99
Modbus protocol: 1 to 247
300 to 19200 bps
Operating Instructions, 05/2019, A5E47629414-AA
SITRANS RD200