Emerson Series 3000 manual Output signals continued, Fault indication, Digital communications

Output signals continued

Fault indication

When a fault is detected, outputs go to configured states. User can select upscale, downscale, internal zero, or none. Milliamp outputs conform to NAMUR NE43 (June 1994).

Upscale	Milliamp	21 to 24 mA, user configurable
	Frequency	15,000 Hz
Downscale	Milliamp	1 to 3.6 mA, user configurable
	Frequency	0 Hz
Internal zero	Drives the mA and frequency outputs for process variables to zero values
None	Ignores fault conditions
Digital communications
RS-485 port	One pair of terminals supports SP (service port) mode or RS-485 mode. On device power-up, the
	user has 10 seconds to connect in SP mode. After 10 seconds, the terminals switch to RS-485
	mode. The communication parameters in SP mode are:
	Data rate	38,400 baud
	Parity	No parity
	Stop bit	One stop bit
	Address	111
	In RS-485 mode, the Series 3000 can communicate via Modbus RTU, Modbus ASCII, or HART(1)
	protocols. The communication parameters are configurable with ProLink II software, Modbus, or
	the display. The shipped default parameters are:
	Data rate	9600 baud
	Parity	Odd
	Stop bit	One stop bit
	The RS-485 port can also be configured as a printer port (see below).
HART Bell 202(1)	The HART Bell 202 signal is superimposed on the primary mA output, and is available for host
	system interface. The HART Bell 202 communication parameters are:
	Frequency	1.2 and 2.2 KHz
	Amplitude	0.8 mA peak-to-peak
	Data rate	1200 baud
	Resistance	Loop requires 250 to 600 Ohms resistance
Printer port	The RS-485 port can be configured as a printer port. When the RS-485 port is
	configured as a printer port, it cannot be used for any other function.
	Requires external RS-232 adapter (not included)

Bidirectional with Epson printer; send only with all other printers and when using a multidrop configuration

(1)Using HART, it is possible to configure basic transmitter functionality, and read/write batch setpoints and totals. Series 3000 batch applications or enhanced density applications cannot be configured using HART. Using Modbus, all transmitter functionality, batch commands, and batch applications can be controlled.

Micro Motion® Series 3000 Transmitters and Discrete Controllers 7