Hello Motorola MOSCAD fans! I saw that with tongue in cheek.
We are configuring a new Wonderware HMI data acquisition server. It will either communicate with a MOSCAD Series 400 CPU via 9-pin serial port, or via a serial-to-TCP bridge device. It was suggested to me that the DB-9 cable for...
I asked a similar question but it was buried within a discussion of an obscure RTU. Perhaps folks who know Maple Systems OITs and the Modicon protocol have some advice on this one...
We need to hook up some simple Maple Silver series (HMI520T) 6" operator displays to Motorola MOSCAD and...
We inherited a SCADA system which uses Motorola MOSCAD ("-L" I think) hardware for RTU/store & forward operations. It uses "Toolbox" software for configuration and logic programing. Toolbox version 8.50, which runs on Windows 2000, supports up to 41 zones on a radio link. For example, radio...
Our client wants to measure the flow rate of a brine stream (reject from RO/NF). It's closed pipe on the discharge of a centrif pump. They say they don't like mag meters but would consider ultrasonic if it's not "too expensive". I'm thinking coriolis is elegant but perhaps costs more...
We have a stream gauge mounted in a seasonal stream channel that experiences drastic changes in flow during storms. IE 6" flowing through v-notch weir in summer; 5' (feet) flowing over broad crest during flood.
The existing level sensor is strapped to a stake which is driven into the streambed...
I'm tasked with adapting an old hard-wired control system to be a manual backup to a new PLC-based system. An operator must be able to designate which analog signal (4-20 mA) controls a pump by using a hand switch. Easy enough to route either one analog or the other through the contacts of a...
We're working with a client on a field site automation project. They have about 90 sites where they will be monitoring a flow meter and control valve. Control will be by Modicon PLC. SCADA central terminal will use Wonderware Archestra software. Communications will be via cellular modem...
I'm trying to characterize the system curve for an existing wastewater aeration system based on centrifugal multistage blowers installed in 1991. Specifically, I'm interested in the pressure drop across the inlet air filter. The blower is rated 125 HP and delivers about 1800 scfm drawn from...
I'm trying to characterize the system curve for an existing wastewater aeration system based on centrifugal multistage blowers installed in 1991. Specifically, I'm interested in the pressure drop across the inlet air filter. The blower is rated 125 HP and delivers about 1800 scfm drawn from...
I'm looking at aeration headers delivering compressed air from blowers. Thanks to those in a previous thread who helped me debug head loss calcs.
Anyway, today I'm looking at average temperature of air in the pipe. Since the pipe is uninsulated, I'm iterating heat transfer equations in order...
I'm checking head losses on an air header that delivers about 1400 cfm at 10.5 psig and 200F (average in pipe) from a blower. The main header is 20" steel pipe, which I think is plenty oversized for minimal friction losses. So I expect the losses to be perhaps only a fraction of an inch. The...
I searched the forums but couldn't find any topics. I'm looking for information on surge as it occurs in multistage centrifugal blowers (room temperature air service). It's been suggested that because the blower curve has a saddle in its upper end (as opposed to continuously rising to...
I'm working with a municipal client who needs to install many electrical enclosures on sidewalks, along roadsides, and near fields. Their old cabinets are rusting. Their original intent was to buy standard "phosphatized" and powder coated Hoffman enclosures.
Can anyone clarify if the...
Our client had a butterfly valve/actuator/limit switch assembly in storage for over 30 years. Now they want to use it. The limit switch is manufactured by Limitorque (who are not answering their phones at the moment). They gave me an old wiring diagram which shows a PAIR of potentiometers...
