CAMP OPC Items

Table Of Contents

Standard Items

Protocol Items

The Camp protocol implementation supports register numbers as item names. To access a register, client applications specify the register number that is within one of the register ranges in the selected register set for the device. Item names can be specified as in the table below:
Items Names are derived from the following list of Camp Data Types. The Common Data Types, Loop Data Types, and Alarm Data Types tables below contain all of the supported CAMP Item Names. You can construct valid item names from this table by concatenating the String in the Item Name Column with an address. A colon can be used as a delimiter between the Item Name and the Address.

Example 1: V 500 and V500 are both valid item names which would read data from V register 500.

Example 2: LTS 2 and LTS2 are both valid item names that would request the 2nd. Loop Sample Rate (sec). Addresses for the camp protocol are 1 based.

Common Data Types

Item Name	Data Type	Description	Camp Type	Access
V	I2	V Memory	0x01	R/W
K	I2	K Memory	0x02	R/W
X	BOOL	Discrete Input Packed	0x06	R/W
Y	BOOL	Discrete Output Packed	0x07	R/W
C	BOOL	Control Register Packed	0x08	R/W
WX	I2	Word Input	0x09	R/W
WY	I2	Word Output	0x0A	R/W
TCP	I2	Timer/Counter Preset	0x0E	R/W
TCC	I2	Timer/Counter Current	0x0F	R/W
DSP	I2	Drum Step Preset	0x10	R/W
DSC	I2	Drum Step Current	0x11	R/W
DCP	I2	Drum Count Preset	0x12	R/W
STW	UI2	System Status Word	0x1A	R
DCC	UI4	Drum Current Count	0x1B	R

Loop Data Types

Item Name	Data Type	Description	Camp Type	Access
LKC	R4	Loop Gain	0x20	R/W
LTI	R4	Loop Reset Time (min)	0x21	R/W
LTD	R4	Loop Rate Time (min)	0x22	R/W
LHA	R4	Loop High Alarm Time	0x23	R/W
LLA	R4	Loop Low Alarm Time	0x24	R/W
LPV	R4	Loop Process Variable	0x25	R/W
LPVH	R4	Loop PV High Limit	0x26	R/W
LPVL	R4	Loop PV Low Limit	0x27	R/W
LODA	R4	Loop Orange Dev Alarm Limit	0x28	R/W
LYDA	R4	Loop Yellow Dev Alarm Limit	0x29	R/W
LTS	R4	Loop Sample Rate (se)	0x2A	R/W
LSP	R4	Loop Setpoint	0x2B	R/W
LMN	R4	Loop Output %	0x2C	R/W
LVF	UI2	Loop Status (V) Flags	0x2D	R
LCF	UI4	Loop Control (C) Flags	0x2E	R/W
LRSF	UI2	Loop Ramp/Soak Status Flags	0x2F	R
LERR	R4	Loop Error	0x30	R
LMX	R4	Loop Bias	0x31	R/W
LHHA	R4	Loop High High Alarm Limit	0x32	R/W
LLLA	R4	Loop Low Low Alarm Limit	0x33	R/W
LRCA	R4	Loop Rate of Change Alarm	0x34	R/W
LSPH	R4	Loop Setpoint High Limit	0x35	R/W
LSPL	R4	Loop Setpoint Low Limit	0x36	R/W
LADB	R4	Loop Alarm Deadband	0x37	R/W
LHAR	I2	Loop Raw High Alarm Limit	0x38	R/W
LLAR	I2	Loop Raw Low Alarm Limit	0x39	R/W
LPVR	I2	Loop Raw Process Variable	0x3A	R/W
LODAR	I2	Loop Raw Orange Dev Limit	0x3B	R/W
LYDAR	I2	Loop Raw Yellow Dev Limit	0x3C	R/W
LMNR	I2	Loop Raw Output	0x3D	R/W
LSPR	I2	Loop Raw Setpoint	0x3E	R/W
LERRR	I2	Loop Raw Error	0x3F	R/W
LHHAR	I2	Loop Raw High High Alarm Limit	0x40	R/W
LLLAR	I2	Loop Raw Low Low Alarm Limit	0x41	R/W
LADBR	I2	Loop Raw Alarm Deadband	0x42	R/W
LMXR	I2	Loop Raw Bias	0x48	R/W
LSPLR	I2	Loop Raw Setpoint Low Limit	0x49	R/W
LSPHR	I2	Loop Raw Setpoint High Limit	0x4A	R/W
LCFH	I2	Loop C Flags - MSW	0x4B	R/W
LCFL	I2	Loop C Flags - LSW	0x4C	R/W
LKD	R4	Loop Derivative Gain Limiting Coef.	0x4D	R/W
LRSN	I2	Loop Ramp/Soak Step Number	0x4E	R/W
LACK	I2	Loop Alarm Ack Flags	0x4F	R

Alarm Data Types

Item Name	Data Type	Description	Camp Type	Access
AHA	R4	Alarm High Alarm Limit	0x50	R/W
ALA	R4	Alarm Low Alarm Limit	0x51	R/W
APV	R4	Alarm Process Variable	0x52	R/W
APVH	R4	Alarm PV High Limit	0x53	R/W
APVL	R4	Alarm PV Low Limit	0x54	R/W
AODA	R4	Alarm Orange Dev Alarm Limit	0x55	R/W
AYDA	R4	Alarm Yellow Dev Alarm Limit	0x56	R/W
ATS	R4	Alarm Sample Rate (sec)	0x57	R/W
ASP	R4	Alarm Setpoint	0x58	R/W
AVF	I2	Alarm V Flags	0x59	R
ACF	R4	Alarm C Flags	0x5A	R/W
AERR	R4	Alarm Error	0x5B	R
AHHA	R4	Alarm High High Alarm Limit	0x5C	R/W
ALLA	R4	Alarm Low Low Alarm Limit	0x5D	R/W
ARCA	R4	Alarm Rate of Change Alarm Limit	0x5E	R/W
ASPH	R4	Alarm Setpoint High Limit	0x5F	R/W
ASPL	R4	Alarm Setpoint Low Limit	0x60	R/W
AADB	R4	Alarm Alarm Deadband	0x61	R/W
AHAR	I2	Alarm Raw High Alarm Limit	0x62	R/W
ALAR	I2	Alarm Raw Low Alarm Limit	0x63	R/W
APVR	I2	Alarm Raw Process Variable	0x64	R/W
AODAR	I2	Alarm Raw Orange Deviation	0x65	R/W
AYDAR	I2	Alarm Raw Yellow Alarm Limit	0x66	R/W
ASPR	I2	Alarm Raw Setpoint	0x67	R/W
ADBR	I2	Alarm Raw Alarm Deadband	0x68	R/W
AERRR	I2	Alarm Raw Error	0x69	R
AHHAR	I2	Alarm	0x6A	R/W
ALLAR	I2	Alarm Raw Low Low Alarm Limit	0x6B	R/W
ASPLR	I2	Alarm Raw Setpoint Low Limit	0x6F	R/W
ASPHR	I2	Alarm Raw Setpoint High Limit	0x70	R/W
ACFH	I2	Alarm MSW Alarm C Flag	0x71	R/W
ACFL	I2	Alarm LSW Alarm C Flag	0x72	R/W
AACK	I2	Analog Alarm - Alarm Ack Flag	0x73	R

Item Conversion

The CAMP protocol module supports the following conversion flags to convert CAMP items defined as I2 to other types in the client application. Appending the proper suffix to the item’s address will read in data from specified address as a different type. Item Conversion is only allowed for camp items defined as I2 such as V and K.

Note

Only even addresses starting with 2 are allowed for conversions that require two words to be read.

Optional Type Conversions on Camp Integer (I2) Types

Suffix	Function
w or word	16 bit unsigned integer
s or short	16 bit signed integer
dw or dword	32 bit unsigned integer
l or long	32 bit signed integer
f or Float	32 bit float
/0-15	Boolean value stored at specified bit position; 0=LSB

Example 1:
V:500float and v:500f will obtain the 32-bit floating point value stored in v500 and v501
Example 2:
V:500/3 will obtain the bit value at bit position 3 stored in V500.
V:500/0 will obtain the least significant bit value stored in V500
V:500/15 will obtain the most significant bit value stored in V500