Search results

I didn't understand the question either. Maybe a damped approach to setpoint with no overshoot appears to be exponential?

> is it possible to connect a transmitter output to another transmitter? No. > if we connect the 4-20 mA output of one transmitter parallel to other transmitters slot of PLC, what will happen? I'm assuming that a 'transmitters slot of PLC' is a PLC analog input connected to a...

The 3rd digit in the model number defines which comm protocol/transport layer your 35A has. none, 485, Ethernet, CC-Link, Profibus-DP or DeviceNet. The later 3 apparently come with Modbus master as well. Find out if your SCADA has a driver for the protocol/transport layer that your...

The Siemens LR560 radar was made for grain silos. Its start-up wizard even asks whether the silo is steel or concrete. It'll make the long shot and has the tightest beam angle which gives the best return echo. It'll handle the dust. No radar will shoot through a fill stream though...

2 wire, loop powered, 4-20mA field transmitters use approximately 3.5-3.6mA to run the device's electronics. Any current above that level is used for output signaling purposes. Before 4-20mA became the standard, some field instruments used the 10-50mA because their electronics needed more...

No, not in the hazardous area.

I think you've answered your own question; whatever device is using a 50mA control signal needs more energy to do whatever it does than 20mA provides.

What kind of load cell do you have that outputs a milliamp signal? Most load cells have a mV/volt output. Are you sure that your load cell has a conditioned current loop output?

The API 4300 G spec sheet says it has an input range up to 900mAdc and a selection of conventional outputs like 0-10Vdc. http://api-usa.com/pdf/api/api4300g-4310g.pdf (take out any spaces the forum inserts into the URL)

The inverter/drive is a Modbus slave. You need a Modbus master to initiate a write command to the slave. A Modbus master can be part of an HMI panel, a standard or optional function in a PLC, a component in HMI/SCADA software, or the driver in an OPC server. The Modbus master has...

Do you have some means of configuring the slave address? DIP switch? One thing that's missing - what is number format for each register? signed integer? unsigned integer? 32 bit floating point? 32 bit long integers? bit packed? What are the engineering units for the register values...

In OPC, the OPC server has the low-level driver that talks the comm protocol of the field device. The OPC server is not 'on' the PLC, the OPC server resides on a PC somewhere and the OPC server talks the PLC's protocol in order to fetch or send data to the PLC, which it then transfers to...

I knew I'd seen a reference to a pressure tap location spec somewhere but it took a day to recall where. The valve capacity testing protocol in ANSI/ISA S75.02-1988 specifies pressure tap location and construction used for measuring upstream and downstream pressures during testing...

For temperature, you get the temperature for point in the flow profile the tip of the thermowell ends up at, right? Liptak has diagrams for placement of thermowells in his Temperature Measurement or Instrument Engineers Handbook. E&H reproduced and enhanced illustrations of several...

If it's a true force balance transmitter, the style with the diaphragms stacked on "top' of one another (on the same center axis) with an obvious zero adjustment on the 'top', like the old Taylor 200T, then the span adjustment was at opposite end of the zero adjustment, at the bottom, as it...

I've heard that JBus is a minor derivative of Modbus, but I had never heard that the CAN protocol has any resemblance to Modbus. Are you sure the device's protocol is CAN? I don't know what Windmill is, but SimplyModbus talks Modbus, not CAN. You cannot expect that a Modbus master...

The bad data from mixing wire types makes me shudder. You can't dig up some J wire to do it right the first time? How many points? How much J wire? More than 100 feet/30m total? A local controls distributor doesn't have a roll of J wire you can buy with petty cash? Here in the USA...

I love Banner Engineering's documentation because they explicitly provide the format and then give an example. Very wise. The data below are from Banner's wireless node radio with four RTDs, document 155864, page 7. Holding Register Representation: Min. (Dec) -32768 Max. (Dec) 32767...

Why not? According to my chart, 1 mm2 is a size somewhere between 18 and 16 AWG. That's more than sufficient to 20mA over 50m.

If Rosemount can, why not you, too? pg 13, 3144P manual: Hot Backup® provides temperature measurement redundancy.