Allen Bradley PLC

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Programming notes:

RSLogix programming software issues:

• Won't connect, gives "No response from processor at selected path/node" error.

Due to the fact that we use a USB-serial converter, the PC can arbitrarily assign the wrong comm port number to the adapter. To verify communications;

1. ) Right-click "My Computer", and from pop-up menu, select "Properties".
2. ) A "System" window will appear. On the left, click "Device Manager".
3. ) Scroll down and click on "Ports (COM & LPT)". That entry will expand, and you will see "USB Serial Port", followed by a comm port number such as "COM1", "COM6, etc; Take note of that number and then close the window.
4. ) Open RSLinx Classic. Click the middle of the three square buttons, which looks like a little cable; a "Configure Drivers" window will open.
5. ) On the right, click the "Configure" button; A "Configure RS-232 DF1 Devices" window will open.
6. ) Look for a drop-down list titled "Comm Port:"; this should show the same number that you saw in step 3, above. If it does not, simply click on the little down-arrow to change it.
7. ) Click the "Auto-Configure" button. The PC will now test all possible serial communication settings until it finds the right ones. If it does NOT, you may need to power the PLC and/or the PC off and on.
8. ) Minimize RSLinx Classic, and re-open RSLogix. You should now be able to connect.

Micrologix 1000 Notes

Replacement Relays:
Omron

Micrologix 1200 Notes

Replacement Relays:
Original is Takamisawa (Fujitsu) NY24W-L, but not available from our suppliers. An acceptable substitute is Omron G6M-1A-DC24 (Allied stock# 70175686), with the caveat that contact current rating is reduced to 3A (as opposed to 5A with the Takamisawa unit.

SLC 500 Notes

Differences between SLC 5 series PLCs:

SLC 5/01
Processors let you configure modular controllers of up to 960 I/O and a 1K- or 4K-instruction memory capacity.

SLC 5/02
Processors let you configure modular controllers of up to 4096 inputs plus 4096 outputs nominally and a 4K-instruction memory. By installing an optional scanner module into one of the 30 I/O module slots, you can add ControlNet I/O, DeviceNet I/O, or Universal Remote I/O to the system. They offer 19 additional instructions, including a message instruction for initiating peer-to peer communication.

SLC 5/03
Processors let you configure modular controllers of up to 4096 inputs plus 4096 outputs and a memory of 8K, 16K, or 32K words. In addition to the features of the SLC 5/02, they have a second built-in communication port-an RS-232-C port that can be configured for ASCII or DF1 protocol, and can be configured for connection to a 1761-NET-AIC converter to provide access to a DH-485 network. SLC 5/03 processors provide bit-instruction execution times of 0.44ms and an overall system throughput of up to 10 times faster than competitive processors. Additional capabilities include: floating-point math, online programming and run-time editing, flash memory upgrades, built-in key-switch, and a built-in real-time clock and calendar.

SLC 5/04 and 5/05
Processors let you configure modular controllers of up to 4096 inputs plus 4096 outputs and a memory of 16 K, 32K, or 64K words. They have all the features of the SLC 5/03 processors, plus a faster communication port and shorter execution times (bit-instruction execution times of 0.37ms). Instead of a DH-485 port, the SLC 5/04 has a built-in DH+ port for communication with other SLC 5/04 and PLC processors, operator interfaces, and programming terminals. Communication via the DH+ network is three times faster than DH-485 communication. SLC 5/05 processors provide a 10/100BASE-T, 10 or 100 Mbps Ethernet port.

Replacement SLC500 battery
Dantona COMP-109 "B9650T" (Allied Stock #: 70157717)

Arc Suppression

• AC snubbers:
  

Allied Electronics pn# 70184748 - ([Littlefuse] Varistor, Circuit Protection; 175VAC; 455V; 4500A; Metal Oxide; 700pF; Radial; 85degC).

• DC snubbers:
  

Allied Electronics pn# 70015970 - ([HVCA] 1N4004 DIODE; 1 A (MAX.) @ 25C IF; 1.1 V (MAX.) @ 25C; 5 UADC (MAX.) @ 25C IR).

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