Yokogawa µR20000 - Manual (Page 55)

4-12
IM 04P01B01-17E
4.4 Setting Commands
p4 Alarm type
H High limit alarm
L Low limit alarm
h Difference high limit alarm
l Difference low limit alarm
R High limit on rate-of-change alarm
r Low limit on rate-of-change alarm
T Delay high limit alarm
t Delay low limit alarm
(Characters are case-sensitive.)
p5 Alarm value
p6 Relay output
ON Relay ON
OFF Relay OFF
p7 Relay number (µR10000: I01 to I06,
µR20000: I01 to I06, I11 to I16, I21 to I26,
I31 to I36)
Query SA[p1[,p2]]?
Example Set a high limit alarm (alarm value = 1000) on
alarm number 1 of channel 02 and output to
relay I01.
SA02,1,ON,H,1000,ON,I01
Description • When the input range is set to SKIP (SR
command), p3 cannot be turned ON.
• The alarm settings are all turned OFF for the
following cases.
• When the input type is changed (VOLT, TC,
etc).
• When the range type is changed.
• When the span and scaling values are
changed during linear scaling (includes
changing the decimal position).
• The h and l settings of p4 are valid only when
the measurement range is set to computation
between channels.
• The hysteresis of alarm ON/OFF (valid when
p4 is H or L) is set using the XA command.
• If p4 is set to R or r, set the interval for the
high/low limit on the rate-of-change using the
XA command.
• The T and t settings of p4 can be specified
when the alarm delay function is enabled (UF
command).
• If p4 is set to T or t, set the alarm delay time
for the delay high/low limit alarm using the BD
command.
• Parameter p5 for the high limit alarm/low limit
alarm and delay high limit alarm/delay lowlimit
alarm
• For DC voltage, TC, and RTD input:
Values within the measurable range in the
specified range (example: –2.000 to 2.000
V for the 2 V range).
• For ON/OFF input (DI): 0 or 1.
• For scaling (1-5V, scaling, and square root):
−5 to 105% of the scale span (except within
−20000 to 30000).
• Parameter p5 for the difference high limit
alarm/difference low limit alarm: Values in the
measurable range can be specified (example:
–1760.0 to 1760.0°C for the TC type R).
• Parameter p5 for the high limit on rate-of-
change alarm/low limit on rate-of-change
alarm: A value greater than or equal to
1 digit can be specified. For example, 1
digit corresponds 0.001 for the 2 V range
(measurable range: –2.000 to 2.000 V). The
maximum value that can be specified is the
width of the measurable range (4.000 V for 2
V range). For ON/OFF input, only “1” can be
specified.
• On models with the computation function (/M1
option), alarms can be set on computation
channels.
• When the computation equation setting (SO
command) is turned OFF, p3 cannot be
turned ON.
• For computation channels, the alarm types
that can be specified are H (high limit
alarm), L (low limit alarm), T (delay high
limit alarm), and t (delay low limit alarm).
T and t can be specified when the alarm
delay function is enabled (UF command).
• If p4 is set to T or t, set the alarm delay
time for the delay high/low limit alarm using
the BD command.
• Set p5 within the range –9999999 to
99999999 excluding the decimal using an
integer.
• The alarm ON/OFF hysteresis is set using
the XA command.
• If the computation channel ON/OFF state,
the computing equation, or the span
value is changed, all alarm settings of that
channel are turned OFF.
SN Sets the unit.
Syntax SN p1,p2
p1 Channel number
p2 Unit string (up to 6 characters)
Query SN[p1]?
Example Set the unit of channel 02 to M/H.
SN02,M/H
Description • The unit setting is valid on channels set to
1-5V, scaling, or square root.
• For the characters that can be used for the
units, see appendix 1, “ASCII Character
Codes.”
• On models with the computation function
(/M1 option), unit can be set on computation
channels.