Allen-Bradley 1756-RM ControlLogix Redundancy Module

Allen-Bradley 1756-RM ControlLogix Redundancy Module Description:

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Allen-Bradley 1756-RM ControlLogix Redundancy Module

Allen-Bradley 1756-RM ControlLogix Redundancy Module

Allen-Bradley 1756-RM ControlLogix Redundancy Module 

Mfr. Part Number:	1756-RM
Manufacturer:	Allen-Bradley / Rockwell Automation
Description:	Allen-Bradley 1756-RM ControlLogix Redundancy Module
Full Description:	Allen-Bradley 1756-RM ControlLogix Redundancy Module, Supports two 1756-L61, -L62, -L63 Controllers or one 1756-L64 Controller and up to seven Communication Modules
UPC / GTIN:	10612598345936
Status:	Discontinued by manufacturer

 

Protocol Mode
The Protocol Mode determines how Logix tag data is accessed from the controller. There are three types of
protocol modes: Symbolic, Logical Non-Blocking and Logical Blocking. Descriptions are as follows:
l Symbolic Mode: Each client/server tag address is represented in the packet by its ASCII character
name.
l Logical Non-Blocking Mode: Each client/server tag is represented by its logical memory address in
the PLC.
l Logical Blocking Mode: The Logix tag is accessed as a single chunk of data. Each client/server tag
(such as MYTIMER.ACC) has a corresponding Logix tag (MYTIMER). Many client/server tags can
belong to the same Logix tag, as in the case of structures. On every read cycle, the Logix tag is read,
its block is updated in the driver cache and all client/server tags are updated from this cache.
Logical Non-Blocking Mode is generally recommended because it is the most efficient mode for gathering
and processing Logix tag data. Symbolic Mode is recommended for backward compatibility, whereas Logical
Non-Blocking Mode is recommended for projects containing a small number of references to UDT and/or
predefined structure Logix tags. Although Logical Blocking Mode can be efficient, it can also hurt
performance if used incorrectly. For more information on each mode's benefits and detriments, refer to
Choosing a Protocol Mode.

Tag Division Tips
Users should designate one or more devices for Logical Blocking purposes and one or more devices for
Logical Non-Blocking purposes. This improves performance because different tags in a project are often
better suited for different modes. When utilizing tag division, users should do the following:
1. Assign server tags referencing Atomic Logix tags (array or non-array) to the Logical Non-Blocking
device.
2. Assign server tags referencing a Structure Logix tag composed of one-third* or less of the Structure
tag to the Logical Non-Blocking device(s). For example, if there are 55** or less member tags
referencing a PID_ENHANCED Logix tag, all these tags should be assigned to the Logical NonBlocking
device.
3. Assign server tags referencing a Structure Logix tag composed of one-third* or more of the
Structure tag to the Logical Blocking device(s). For example, if there are more than 55** member
tags referencing

1746-I*8 Any 8 pt Discrete Input Module
1746-I*16 Any 16 pt Discrete Input Module
1746-I*32 Any 32 pt Discrete Input Module
1746-O*8 Any 8 pt Discrete Output Module
1746-O*16 Any 16 pt Discrete Output Module
1746-O*32 Any 32 pt Discrete Output Module
1746-IA4 4 Input 100 / 120 VAC
1746-IA8 8 Input 100 / 120 VAC
1746-IA16 16 Input 100/120 VAC
1746-IB8 8 Input (Sink) 24 VDC
1746-IB16 16 Input (Sink) 24 VDC
1746-IB32 32 Input (Sink) 24 VDC
1746-IG16 16 Input [TTL] (Source) 5 VDC
1746-IM4 4 Input 200 / 240 VAC
1746-IM8 8 Input 200 / 240 VAC
1746-IM16 16 Input 200/240 VAC
1746-IN16 16 Input 24 VAC / VDC
1746-ITB16 16 Input [Fast] (Sink) 24 VDC
1746-ITV16 16 Input [Fast] (Source) 24 VDC
1746-IV8 8 Input (Source) 24 VDC
1746-IV16 16 Input (Source) 24 VDC
1746-IV32 32 Input (Source) 24 VDC
1746-OA8 8 Output (TRIAC) 100 / 240 VAC
1746-OA16 16 Output (TRIAC) 100 / 240 VAC
1746-OB8 8 Output [Trans] (Source) 10 / 50 VDC
1746-OB16 16 Output [Trans] (Source) 10 / 50 VDC
1746-OB32 32 Output [Trans] (Source) 10/50 VDC
1746-OBP16 16 Output [Trans 1 Amp] (SRC) 24 VDC
1746-OV8 8 Output [Trans] (Sink) 10/50 VDC
1746-OV16 16 Output [Trans] (Sink) 10/50 VDC
1746-OV32 32 Output [Trans] (Sink) 10/50 VDC
1746-OW4 4 Output [Relay] VAC/VDC
1746-OW8 8 Output [Relay] VAC/VDC
1746-OW16 16 Output [Relay] VAC/VDC
1746-OX8 8 Output [Isolated Relay] VAC/VDC
1746-OVP16 16 Output [Trans 1 Amp] (Sink) 24 VDC3
1746-IO4 2 In 100 / 120 VAC 2 Out [Rly] VAC / VDC3
1746-IO8 4 In 100 / 120 VAC 4 Out [Rly] VAC / VDC4
1746-IO12 6 In 100 / 120 VAC 6 Out [Rly] VAC / VDC
1746-NI4 4 Ch Analog Input
1746-NIO4I Analog Comb 2 in & 2 Current Out
1746-NIO4V Analog Comb 2 in & 2 Voltage Out
1746-NO4I 4 Ch Analog Current Output
1746-NO4V 4 Ch Analog Voltage Output
1746-NT4 4 Ch Thermocouple Input Module
1746-NR4 4 Ch Rtd / Resistance Input Module
1746-HSCE High-Speed Counter/Encoder
1746-HS Single Axis Motion Controller
1746-OG16 16 Output [TLL] (SINK) 5 VDC
1746-BAS Basic Module 500 5/01 Configuration
1746-BAS Basic Module 5/02 Configuration
1747-DCM Direct Communication Module (1/4 Rack)
1747-DCM Direct Communication Module (1/2 Rack)
1747-DCM Direct Communication Module (3/4 Rack)
1747-DCM Direct Communication Module (Full Rack)
1747-SN Remote I/O Scanner
1747-DSN Distributed I/O Scanner 7 Blocks
1747-DSN Distributed I/O Scanner 30 Blocks
1747-KE Interface Module, Series A
1747-KE Interface Module, Series B
1746-NI8 8 Ch Analog Input, Class
1746-NI8 8 Ch Analog Input, Class
1746-IC16 16 Input (Sink) 48 VDC
1746-IH16 16 Input [Trans] (Sink) 125 VDC
1746-OAP12 12 Output [Triac] 120/240 VDC
1746-OB6EI 6 Output [Trans] (Source) 24 VDC
1746-OB16E 16 Output [Trans] (Source) Protected
1746-OB32E 32 Output [Trans] (Source) 10 / 50 VDC
1746-OBP8 8 Output [Trans 2 amp] (Source) 24 VDC
1746-IO12DC 6 Input 12 VDC, 6 Output [Rly]
1746-INI4I Analog 4 Ch. Isol. Current Input
1746-INI4VI Analog 4 Ch. Isol. Volt/Current Input
1746-INT4 4 Ch. Isolated Thermocouple Input
1746-NT8 Analog 8 Ch Thermocouple Input
1746-HSRV Motion Control Module 12 8
1746-HSTP1 Stepper Controller Module
1747-MNET MNET Network Comm Module
1746-QS Synchronized Axes Module
1747-QV Open Loop Velocity Control
1747-RCIF Robot Control Interface Module
1747-SCNR ControlNet SLC Scanner
1747-SDN DeviceNet Scanner Module
1394-SJT GMC Turbo System
1203-SM1 SCANport Comm Module - Basic
1203-SM1 SCANport Comm Module - Enhanced
AMCI-1561 AMCI Series 1561 Resolver Module

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